/*  Prototype JavaScript framework, version 1.7

 *  (c) 2005-2010 Sam Stephenson

 *

 *  Prototype is freely distributable under the terms of an MIT-style license.

 *  For details, see the Prototype web site: http://www.prototypejs.org/

 *

 *--------------------------------------------------------------------------*/



var Prototype = {



  Version: '1.7',



  Browser: (function(){

    var ua = navigator.userAgent;

    var isOpera = Object.prototype.toString.call(window.opera) == '[object Opera]';

    return {

      IE:             !!window.attachEvent && !isOpera,

      Opera:          isOpera,

      WebKit:         ua.indexOf('AppleWebKit/') > -1,

      Gecko:          ua.indexOf('Gecko') > -1 && ua.indexOf('KHTML') === -1,

      MobileSafari:   /Apple.*Mobile/.test(ua)

    }

  })(),



  BrowserFeatures: {

    XPath: !!document.evaluate,



    SelectorsAPI: !!document.querySelector,



    ElementExtensions: (function() {

      var constructor = window.Element || window.HTMLElement;

      return !!(constructor && constructor.prototype);

    })(),

    SpecificElementExtensions: (function() {

      if (typeof window.HTMLDivElement !== 'undefined')

        return true;



      var div = document.createElement('div'),

          form = document.createElement('form'),

          isSupported = false;



      if (div['__proto__'] && (div['__proto__'] !== form['__proto__'])) {

        isSupported = true;

      }



      div = form = null;



      return isSupported;

    })()

  },



  ScriptFragment: '<script[^>]*>([\\S\\s]*?)<\/script>',

  JSONFilter: /^\/\*-secure-([\s\S]*)\*\/\s*$/,



  emptyFunction: function() { },



  K: function(x) { return x }

};



if (Prototype.Browser.MobileSafari)

  Prototype.BrowserFeatures.SpecificElementExtensions = false;

/* Based on Alex Arnell's inheritance implementation. */



var Class = (function() {



  var IS_DONTENUM_BUGGY = (function(){

    for (var p in { toString: 1 }) {

      if (p === 'toString') return false;

    }

    return true;

  })();



  function subclass() {};

  function create() {

    var parent = null, properties = $A(arguments);

    if (Object.isFunction(properties[0]))

      parent = properties.shift();



    function klass() {

      this.initialize.apply(this, arguments);

    }



    Object.extend(klass, Class.Methods);

    klass.superclass = parent;

    klass.subclasses = [];



    if (parent) {

      subclass.prototype = parent.prototype;

      klass.prototype = new subclass;

      parent.subclasses.push(klass);

    }



    for (var i = 0, length = properties.length; i < length; i++)

      klass.addMethods(properties[i]);



    if (!klass.prototype.initialize)

      klass.prototype.initialize = Prototype.emptyFunction;



    klass.prototype.constructor = klass;

    return klass;

  }



  function addMethods(source) {

    var ancestor   = this.superclass && this.superclass.prototype,

        properties = Object.keys(source);



    if (IS_DONTENUM_BUGGY) {

      if (source.toString != Object.prototype.toString)

        properties.push("toString");

      if (source.valueOf != Object.prototype.valueOf)

        properties.push("valueOf");

    }



    for (var i = 0, length = properties.length; i < length; i++) {

      var property = properties[i], value = source[property];

      if (ancestor && Object.isFunction(value) &&

          value.argumentNames()[0] == "$super") {

        var method = value;

        value = (function(m) {

          return function() { return ancestor[m].apply(this, arguments); };

        })(property).wrap(method);



        value.valueOf = method.valueOf.bind(method);

        value.toString = method.toString.bind(method);

      }

      this.prototype[property] = value;

    }



    return this;

  }



  return {

    create: create,

    Methods: {

      addMethods: addMethods

    }

  };

})();

(function() {



  var _toString = Object.prototype.toString,

      NULL_TYPE = 'Null',

      UNDEFINED_TYPE = 'Undefined',

      BOOLEAN_TYPE = 'Boolean',

      NUMBER_TYPE = 'Number',

      STRING_TYPE = 'String',

      OBJECT_TYPE = 'Object',

      FUNCTION_CLASS = '[object Function]',

      BOOLEAN_CLASS = '[object Boolean]',

      NUMBER_CLASS = '[object Number]',

      STRING_CLASS = '[object String]',

      ARRAY_CLASS = '[object Array]',

      DATE_CLASS = '[object Date]',

      NATIVE_JSON_STRINGIFY_SUPPORT = window.JSON &&

        typeof JSON.stringify === 'function' &&

        JSON.stringify(0) === '0' &&

        typeof JSON.stringify(Prototype.K) === 'undefined';



  function Type(o) {

    switch(o) {

      case null: return NULL_TYPE;

      case (void 0): return UNDEFINED_TYPE;

    }

    var type = typeof o;

    switch(type) {

      case 'boolean': return BOOLEAN_TYPE;

      case 'number':  return NUMBER_TYPE;

      case 'string':  return STRING_TYPE;

    }

    return OBJECT_TYPE;

  }



  function extend(destination, source) {

    for (var property in source)

      destination[property] = source[property];

    return destination;

  }



  function inspect(object) {

    try {

      if (isUndefined(object)) return 'undefined';

      if (object === null) return 'null';

      return object.inspect ? object.inspect() : String(object);

    } catch (e) {

      if (e instanceof RangeError) return '...';

      throw e;

    }

  }



  function toJSON(value) {

    return Str('', { '': value }, []);

  }



  function Str(key, holder, stack) {

    var value = holder[key],

        type = typeof value;



    if (Type(value) === OBJECT_TYPE && typeof value.toJSON === 'function') {

      value = value.toJSON(key);

    }



    var _class = _toString.call(value);



    switch (_class) {

      case NUMBER_CLASS:

      case BOOLEAN_CLASS:

      case STRING_CLASS:

        value = value.valueOf();

    }



    switch (value) {

      case null: return 'null';

      case true: return 'true';

      case false: return 'false';

    }



    type = typeof value;

    switch (type) {

      case 'string':

        return value.inspect(true);

      case 'number':

        return isFinite(value) ? String(value) : 'null';

      case 'object':



        for (var i = 0, length = stack.length; i < length; i++) {

          if (stack[i] === value) { throw new TypeError(); }

        }

        stack.push(value);



        var partial = [];

        if (_class === ARRAY_CLASS) {

          for (var i = 0, length = value.length; i < length; i++) {

            var str = Str(i, value, stack);

            partial.push(typeof str === 'undefined' ? 'null' : str);

          }

          partial = '[' + partial.join(',') + ']';

        } else {

          var keys = Object.keys(value);

          for (var i = 0, length = keys.length; i < length; i++) {

            var key = keys[i], str = Str(key, value, stack);

            if (typeof str !== "undefined") {

               partial.push(key.inspect(true)+ ':' + str);

             }

          }

          partial = '{' + partial.join(',') + '}';

        }

        stack.pop();

        return partial;

    }

  }



  function stringify(object) {

    return JSON.stringify(object);

  }



  function toQueryString(object) {

    return $H(object).toQueryString();

  }



  function toHTML(object) {

    return object && object.toHTML ? object.toHTML() : String.interpret(object);

  }



  function keys(object) {

    if (Type(object) !== OBJECT_TYPE) { throw new TypeError(); }

    var results = [];

    for (var property in object) {

      if (object.hasOwnProperty(property)) {

        results.push(property);

      }

    }

    return results;

  }



  function values(object) {

    var results = [];

    for (var property in object)

      results.push(object[property]);

    return results;

  }



  function clone(object) {

    return extend({ }, object);

  }



  function isElement(object) {

    return !!(object && object.nodeType == 1);

  }



  function isArray(object) {

    return _toString.call(object) === ARRAY_CLASS;

  }



  var hasNativeIsArray = (typeof Array.isArray == 'function')

    && Array.isArray([]) && !Array.isArray({});



  if (hasNativeIsArray) {

    isArray = Array.isArray;

  }



  function isHash(object) {

    return object instanceof Hash;

  }



  function isFunction(object) {

    return _toString.call(object) === FUNCTION_CLASS;

  }



  function isString(object) {

    return _toString.call(object) === STRING_CLASS;

  }



  function isNumber(object) {

    return _toString.call(object) === NUMBER_CLASS;

  }



  function isDate(object) {

    return _toString.call(object) === DATE_CLASS;

  }



  function isUndefined(object) {

    return typeof object === "undefined";

  }



  extend(Object, {

    extend:        extend,

    inspect:       inspect,

    toJSON:        NATIVE_JSON_STRINGIFY_SUPPORT ? stringify : toJSON,

    toQueryString: toQueryString,

    toHTML:        toHTML,

    keys:          Object.keys || keys,

    values:        values,

    clone:         clone,

    isElement:     isElement,

    isArray:       isArray,

    isHash:        isHash,

    isFunction:    isFunction,

    isString:      isString,

    isNumber:      isNumber,

    isDate:        isDate,

    isUndefined:   isUndefined

  });

})();

Object.extend(Function.prototype, (function() {

  var slice = Array.prototype.slice;



  function update(array, args) {

    var arrayLength = array.length, length = args.length;

    while (length--) array[arrayLength + length] = args[length];

    return array;

  }



  function merge(array, args) {

    array = slice.call(array, 0);

    return update(array, args);

  }



  function argumentNames() {

    var names = this.toString().match(/^[\s\(]*function[^(]*\(([^)]*)\)/)[1]

      .replace(/\/\/.*?[\r\n]|\/\*(?:.|[\r\n])*?\*\//g, '')

      .replace(/\s+/g, '').split(',');

    return names.length == 1 && !names[0] ? [] : names;

  }



  function bind(context) {

    if (arguments.length < 2 && Object.isUndefined(arguments[0])) return this;

    var __method = this, args = slice.call(arguments, 1);

    return function() {

      var a = merge(args, arguments);

      return __method.apply(context, a);

    }

  }



  function bindAsEventListener(context) {

    var __method = this, args = slice.call(arguments, 1);

    return function(event) {

      var a = update([event || window.event], args);

      return __method.apply(context, a);

    }

  }



  function curry() {

    if (!arguments.length) return this;

    var __method = this, args = slice.call(arguments, 0);

    return function() {

      var a = merge(args, arguments);

      return __method.apply(this, a);

    }

  }



  function delay(timeout) {

    var __method = this, args = slice.call(arguments, 1);

    timeout = timeout * 1000;

    return window.setTimeout(function() {

      return __method.apply(__method, args);

    }, timeout);

  }



  function defer() {

    var args = update([0.01], arguments);

    return this.delay.apply(this, args);

  }



  function wrap(wrapper) {

    var __method = this;

    return function() {

      var a = update([__method.bind(this)], arguments);

      return wrapper.apply(this, a);

    }

  }



  function methodize() {

    if (this._methodized) return this._methodized;

    var __method = this;

    return this._methodized = function() {

      var a = update([this], arguments);

      return __method.apply(null, a);

    };

  }



  return {

    argumentNames:       argumentNames,

    bind:                bind,

    bindAsEventListener: bindAsEventListener,

    curry:               curry,

    delay:               delay,

    defer:               defer,

    wrap:                wrap,

    methodize:           methodize

  }

})());







(function(proto) {





  function toISOString() {

    return this.getUTCFullYear() + '-' +

      (this.getUTCMonth() + 1).toPaddedString(2) + '-' +

      this.getUTCDate().toPaddedString(2) + 'T' +

      this.getUTCHours().toPaddedString(2) + ':' +

      this.getUTCMinutes().toPaddedString(2) + ':' +

      this.getUTCSeconds().toPaddedString(2) + 'Z';

  }





  function toJSON() {

    return this.toISOString();

  }



  if (!proto.toISOString) proto.toISOString = toISOString;

  if (!proto.toJSON) proto.toJSON = toJSON;



})(Date.prototype);





RegExp.prototype.match = RegExp.prototype.test;



RegExp.escape = function(str) {

  return String(str).replace(/([.*+?^=!:${}()|[\]\/\\])/g, '\\$1');

};

var PeriodicalExecuter = Class.create({

  initialize: function(callback, frequency) {

    this.callback = callback;

    this.frequency = frequency;

    this.currentlyExecuting = false;



    this.registerCallback();

  },



  registerCallback: function() {

    this.timer = setInterval(this.onTimerEvent.bind(this), this.frequency * 1000);

  },



  execute: function() {

    this.callback(this);

  },



  stop: function() {

    if (!this.timer) return;

    clearInterval(this.timer);

    this.timer = null;

  },



  onTimerEvent: function() {

    if (!this.currentlyExecuting) {

      try {

        this.currentlyExecuting = true;

        this.execute();

        this.currentlyExecuting = false;

      } catch(e) {

        this.currentlyExecuting = false;

        throw e;

      }

    }

  }

});

Object.extend(String, {

  interpret: function(value) {

    return value == null ? '' : String(value);

  },

  specialChar: {

    '\b': '\\b',

    '\t': '\\t',

    '\n': '\\n',

    '\f': '\\f',

    '\r': '\\r',

    '\\': '\\\\'

  }

});



Object.extend(String.prototype, (function() {

  var NATIVE_JSON_PARSE_SUPPORT = window.JSON &&

    typeof JSON.parse === 'function' &&

    JSON.parse('{"test": true}').test;



  function prepareReplacement(replacement) {

    if (Object.isFunction(replacement)) return replacement;

    var template = new Template(replacement);

    return function(match) { return template.evaluate(match) };

  }



  function gsub(pattern, replacement) {

    var result = '', source = this, match;

    replacement = prepareReplacement(replacement);



    if (Object.isString(pattern))

      pattern = RegExp.escape(pattern);



    if (!(pattern.length || pattern.source)) {

      replacement = replacement('');

      return replacement + source.split('').join(replacement) + replacement;

    }



    while (source.length > 0) {

      if (match = source.match(pattern)) {

        result += source.slice(0, match.index);

        result += String.interpret(replacement(match));

        source  = source.slice(match.index + match[0].length);

      } else {

        result += source, source = '';

      }

    }

    return result;

  }



  function sub(pattern, replacement, count) {

    replacement = prepareReplacement(replacement);

    count = Object.isUndefined(count) ? 1 : count;



    return this.gsub(pattern, function(match) {

      if (--count < 0) return match[0];

      return replacement(match);

    });

  }



  function scan(pattern, iterator) {

    this.gsub(pattern, iterator);

    return String(this);

  }



  function truncate(length, truncation) {

    length = length || 30;

    truncation = Object.isUndefined(truncation) ? '...' : truncation;

    return this.length > length ?

      this.slice(0, length - truncation.length) + truncation : String(this);

  }



  function strip() {

    return this.replace(/^\s+/, '').replace(/\s+$/, '');

  }



  function stripTags() {

    return this.replace(/<\w+(\s+("[^"]*"|'[^']*'|[^>])+)?>|<\/\w+>/gi, '');

  }



  function stripScripts() {

    return this.replace(new RegExp(Prototype.ScriptFragment, 'img'), '');

  }



  function extractScripts() {

    var matchAll = new RegExp(Prototype.ScriptFragment, 'img'),

        matchOne = new RegExp(Prototype.ScriptFragment, 'im');

    return (this.match(matchAll) || []).map(function(scriptTag) {

      return (scriptTag.match(matchOne) || ['', ''])[1];

    });

  }



  function evalScripts() {

    return this.extractScripts().map(function(script) { return eval(script) });

  }



  function escapeHTML() {

    return this.replace(/&/g,'&amp;').replace(/</g,'&lt;').replace(/>/g,'&gt;');

  }



  function unescapeHTML() {

    return this.stripTags().replace(/&lt;/g,'<').replace(/&gt;/g,'>').replace(/&amp;/g,'&');

  }





  function toQueryParams(separator) {

    var match = this.strip().match(/([^?#]*)(#.*)?$/);

    if (!match) return { };



    return match[1].split(separator || '&').inject({ }, function(hash, pair) {

      if ((pair = pair.split('='))[0]) {

        var key = decodeURIComponent(pair.shift()),

            value = pair.length > 1 ? pair.join('=') : pair[0];



        if (value != undefined) value = decodeURIComponent(value);



        if (key in hash) {

          if (!Object.isArray(hash[key])) hash[key] = [hash[key]];

          hash[key].push(value);

        }

        else hash[key] = value;

      }

      return hash;

    });

  }



  function toArray() {

    return this.split('');

  }



  function succ() {

    return this.slice(0, this.length - 1) +

      String.fromCharCode(this.charCodeAt(this.length - 1) + 1);

  }



  function times(count) {

    return count < 1 ? '' : new Array(count + 1).join(this);

  }



  function camelize() {

    return this.replace(/-+(.)?/g, function(match, chr) {

      return chr ? chr.toUpperCase() : '';

    });

  }



  function capitalize() {

    return this.charAt(0).toUpperCase() + this.substring(1).toLowerCase();

  }



  function underscore() {

    return this.replace(/::/g, '/')

               .replace(/([A-Z]+)([A-Z][a-z])/g, '$1_$2')

               .replace(/([a-z\d])([A-Z])/g, '$1_$2')

               .replace(/-/g, '_')

               .toLowerCase();

  }



  function dasherize() {

    return this.replace(/_/g, '-');

  }



  function inspect(useDoubleQuotes) {

    var escapedString = this.replace(/[\x00-\x1f\\]/g, function(character) {

      if (character in String.specialChar) {

        return String.specialChar[character];

      }

      return '\\u00' + character.charCodeAt().toPaddedString(2, 16);

    });

    if (useDoubleQuotes) return '"' + escapedString.replace(/"/g, '\\"') + '"';

    return "'" + escapedString.replace(/'/g, '\\\'') + "'";

  }



  function unfilterJSON(filter) {

    return this.replace(filter || Prototype.JSONFilter, '$1');

  }



  function isJSON() {

    var str = this;

    if (str.blank()) return false;

    str = str.replace(/\\(?:["\\\/bfnrt]|u[0-9a-fA-F]{4})/g, '@');

    str = str.replace(/"[^"\\\n\r]*"|true|false|null|-?\d+(?:\.\d*)?(?:[eE][+\-]?\d+)?/g, ']');

    str = str.replace(/(?:^|:|,)(?:\s*\[)+/g, '');

    return (/^[\],:{}\s]*$/).test(str);

  }



  function evalJSON(sanitize) {

    var json = this.unfilterJSON(),

        cx = /[\u0000\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g;

    if (cx.test(json)) {

      json = json.replace(cx, function (a) {

        return '\\u' + ('0000' + a.charCodeAt(0).toString(16)).slice(-4);

      });

    }

    try {

      if (!sanitize || json.isJSON()) return eval('(' + json + ')');

    } catch (e) { }

    throw new SyntaxError('Badly formed JSON string: ' + this.inspect());

  }



  function parseJSON() {

    var json = this.unfilterJSON();

    return JSON.parse(json);

  }



  function include(pattern) {

    return this.indexOf(pattern) > -1;

  }



  function startsWith(pattern) {

    return this.lastIndexOf(pattern, 0) === 0;

  }



  function endsWith(pattern) {

    var d = this.length - pattern.length;

    return d >= 0 && this.indexOf(pattern, d) === d;

  }



  function empty() {

    return this == '';

  }



  function blank() {

    return /^\s*$/.test(this);

  }



  function interpolate(object, pattern) {

    return new Template(this, pattern).evaluate(object);

  }



  return {

    gsub:           gsub,

    sub:            sub,

    scan:           scan,

    truncate:       truncate,

    strip:          String.prototype.trim || strip,

    stripTags:      stripTags,

    stripScripts:   stripScripts,

    extractScripts: extractScripts,

    evalScripts:    evalScripts,

    escapeHTML:     escapeHTML,

    unescapeHTML:   unescapeHTML,

    toQueryParams:  toQueryParams,

    parseQuery:     toQueryParams,

    toArray:        toArray,

    succ:           succ,

    times:          times,

    camelize:       camelize,

    capitalize:     capitalize,

    underscore:     underscore,

    dasherize:      dasherize,

    inspect:        inspect,

    unfilterJSON:   unfilterJSON,

    isJSON:         isJSON,

    evalJSON:       NATIVE_JSON_PARSE_SUPPORT ? parseJSON : evalJSON,

    include:        include,

    startsWith:     startsWith,

    endsWith:       endsWith,

    empty:          empty,

    blank:          blank,

    interpolate:    interpolate

  };

})());



var Template = Class.create({

  initialize: function(template, pattern) {

    this.template = template.toString();

    this.pattern = pattern || Template.Pattern;

  },



  evaluate: function(object) {

    if (object && Object.isFunction(object.toTemplateReplacements))

      object = object.toTemplateReplacements();



    return this.template.gsub(this.pattern, function(match) {

      if (object == null) return (match[1] + '');



      var before = match[1] || '';

      if (before == '\\') return match[2];



      var ctx = object, expr = match[3],

          pattern = /^([^.[]+|\[((?:.*?[^\\])?)\])(\.|\[|$)/;



      match = pattern.exec(expr);

      if (match == null) return before;



      while (match != null) {

        var comp = match[1].startsWith('[') ? match[2].replace(/\\\\]/g, ']') : match[1];

        ctx = ctx[comp];

        if (null == ctx || '' == match[3]) break;

        expr = expr.substring('[' == match[3] ? match[1].length : match[0].length);

        match = pattern.exec(expr);

      }



      return before + String.interpret(ctx);

    });

  }

});

Template.Pattern = /(^|.|\r|\n)(#\{(.*?)\})/;



var $break = { };



var Enumerable = (function() {

  function each(iterator, context) {

    var index = 0;

    try {

      this._each(function(value) {

        iterator.call(context, value, index++);

      });

    } catch (e) {

      if (e != $break) throw e;

    }

    return this;

  }



  function eachSlice(number, iterator, context) {

    var index = -number, slices = [], array = this.toArray();

    if (number < 1) return array;

    while ((index += number) < array.length)

      slices.push(array.slice(index, index+number));

    return slices.collect(iterator, context);

  }



  function all(iterator, context) {

    iterator = iterator || Prototype.K;

    var result = true;

    this.each(function(value, index) {

      result = result && !!iterator.call(context, value, index);

      if (!result) throw $break;

    });

    return result;

  }



  function any(iterator, context) {

    iterator = iterator || Prototype.K;

    var result = false;

    this.each(function(value, index) {

      if (result = !!iterator.call(context, value, index))

        throw $break;

    });

    return result;

  }



  function collect(iterator, context) {

    iterator = iterator || Prototype.K;

    var results = [];

    this.each(function(value, index) {

      results.push(iterator.call(context, value, index));

    });

    return results;

  }



  function detect(iterator, context) {

    var result;

    this.each(function(value, index) {

      if (iterator.call(context, value, index)) {

        result = value;

        throw $break;

      }

    });

    return result;

  }



  function findAll(iterator, context) {

    var results = [];

    this.each(function(value, index) {

      if (iterator.call(context, value, index))

        results.push(value);

    });

    return results;

  }



  function grep(filter, iterator, context) {

    iterator = iterator || Prototype.K;

    var results = [];



    if (Object.isString(filter))

      filter = new RegExp(RegExp.escape(filter));



    this.each(function(value, index) {

      if (filter.match(value))

        results.push(iterator.call(context, value, index));

    });

    return results;

  }



  function include(object) {

    if (Object.isFunction(this.indexOf))

      if (this.indexOf(object) != -1) return true;



    var found = false;

    this.each(function(value) {

      if (value == object) {

        found = true;

        throw $break;

      }

    });

    return found;

  }



  function inGroupsOf(number, fillWith) {

    fillWith = Object.isUndefined(fillWith) ? null : fillWith;

    return this.eachSlice(number, function(slice) {

      while(slice.length < number) slice.push(fillWith);

      return slice;

    });

  }



  function inject(memo, iterator, context) {

    this.each(function(value, index) {

      memo = iterator.call(context, memo, value, index);

    });

    return memo;

  }



  function invoke(method) {

    var args = $A(arguments).slice(1);

    return this.map(function(value) {

      return value[method].apply(value, args);

    });

  }



  function max(iterator, context) {

    iterator = iterator || Prototype.K;

    var result;

    this.each(function(value, index) {

      value = iterator.call(context, value, index);

      if (result == null || value >= result)

        result = value;

    });

    return result;

  }



  function min(iterator, context) {

    iterator = iterator || Prototype.K;

    var result;

    this.each(function(value, index) {

      value = iterator.call(context, value, index);

      if (result == null || value < result)

        result = value;

    });

    return result;

  }



  function partition(iterator, context) {

    iterator = iterator || Prototype.K;

    var trues = [], falses = [];

    this.each(function(value, index) {

      (iterator.call(context, value, index) ?

        trues : falses).push(value);

    });

    return [trues, falses];

  }



  function pluck(property) {

    var results = [];

    this.each(function(value) {

      results.push(value[property]);

    });

    return results;

  }



  function reject(iterator, context) {

    var results = [];

    this.each(function(value, index) {

      if (!iterator.call(context, value, index))

        results.push(value);

    });

    return results;

  }



  function sortBy(iterator, context) {

    return this.map(function(value, index) {

      return {

        value: value,

        criteria: iterator.call(context, value, index)

      };

    }).sort(function(left, right) {

      var a = left.criteria, b = right.criteria;

      return a < b ? -1 : a > b ? 1 : 0;

    }).pluck('value');

  }



  function toArray() {

    return this.map();

  }



  function zip() {

    var iterator = Prototype.K, args = $A(arguments);

    if (Object.isFunction(args.last()))

      iterator = args.pop();



    var collections = [this].concat(args).map($A);

    return this.map(function(value, index) {

      return iterator(collections.pluck(index));

    });

  }



  function size() {

    return this.toArray().length;

  }



  function inspect() {

    return '#<Enumerable:' + this.toArray().inspect() + '>';

  }



















  return {

    each:       each,

    eachSlice:  eachSlice,

    all:        all,

    every:      all,

    any:        any,

    some:       any,

    collect:    collect,

    map:        collect,

    detect:     detect,

    findAll:    findAll,

    select:     findAll,

    filter:     findAll,

    grep:       grep,

    include:    include,

    member:     include,

    inGroupsOf: inGroupsOf,

    inject:     inject,

    invoke:     invoke,

    max:        max,

    min:        min,

    partition:  partition,

    pluck:      pluck,

    reject:     reject,

    sortBy:     sortBy,

    toArray:    toArray,

    entries:    toArray,

    zip:        zip,

    size:       size,

    inspect:    inspect,

    find:       detect

  };

})();



function $A(iterable) {

  if (!iterable) return [];

  if ('toArray' in Object(iterable)) return iterable.toArray();

  var length = iterable.length || 0, results = new Array(length);

  while (length--) results[length] = iterable[length];

  return results;

}





function $w(string) {

  if (!Object.isString(string)) return [];

  string = string.strip();

  return string ? string.split(/\s+/) : [];

}



Array.from = $A;





(function() {

  var arrayProto = Array.prototype,

      slice = arrayProto.slice,

      _each = arrayProto.forEach; // use native browser JS 1.6 implementation if available



  function each(iterator, context) {

    for (var i = 0, length = this.length >>> 0; i < length; i++) {

      if (i in this) iterator.call(context, this[i], i, this);

    }

  }

  if (!_each) _each = each;



  function clear() {

    this.length = 0;

    return this;

  }



  function first() {

    return this[0];

  }



  function last() {

    return this[this.length - 1];

  }



  function compact() {

    return this.select(function(value) {

      return value != null;

    });

  }



  function flatten() {

    return this.inject([], function(array, value) {

      if (Object.isArray(value))

        return array.concat(value.flatten());

      array.push(value);

      return array;

    });

  }



  function without() {

    var values = slice.call(arguments, 0);

    return this.select(function(value) {

      return !values.include(value);

    });

  }



  function reverse(inline) {

    return (inline === false ? this.toArray() : this)._reverse();

  }



  function uniq(sorted) {

    return this.inject([], function(array, value, index) {

      if (0 == index || (sorted ? array.last() != value : !array.include(value)))

        array.push(value);

      return array;

    });

  }



  function intersect(array) {

    return this.uniq().findAll(function(item) {

      return array.detect(function(value) { return item === value });

    });

  }





  function clone() {

    return slice.call(this, 0);

  }



  function size() {

    return this.length;

  }



  function inspect() {

    return '[' + this.map(Object.inspect).join(', ') + ']';

  }



  function indexOf(item, i) {

    i || (i = 0);

    var length = this.length;

    if (i < 0) i = length + i;

    for (; i < length; i++)

      if (this[i] === item) return i;

    return -1;

  }



  function lastIndexOf(item, i) {

    i = isNaN(i) ? this.length : (i < 0 ? this.length + i : i) + 1;

    var n = this.slice(0, i).reverse().indexOf(item);

    return (n < 0) ? n : i - n - 1;

  }



  function concat() {

    var array = slice.call(this, 0), item;

    for (var i = 0, length = arguments.length; i < length; i++) {

      item = arguments[i];

      if (Object.isArray(item) && !('callee' in item)) {

        for (var j = 0, arrayLength = item.length; j < arrayLength; j++)

          array.push(item[j]);

      } else {

        array.push(item);

      }

    }

    return array;

  }



  Object.extend(arrayProto, Enumerable);



  if (!arrayProto._reverse)

    arrayProto._reverse = arrayProto.reverse;



  Object.extend(arrayProto, {

    _each:     _each,

    clear:     clear,

    first:     first,

    last:      last,

    compact:   compact,

    flatten:   flatten,

    without:   without,

    reverse:   reverse,

    uniq:      uniq,

    intersect: intersect,

    clone:     clone,

    toArray:   clone,

    size:      size,

    inspect:   inspect

  });



  var CONCAT_ARGUMENTS_BUGGY = (function() {

    return [].concat(arguments)[0][0] !== 1;

  })(1,2)



  if (CONCAT_ARGUMENTS_BUGGY) arrayProto.concat = concat;



  if (!arrayProto.indexOf) arrayProto.indexOf = indexOf;

  if (!arrayProto.lastIndexOf) arrayProto.lastIndexOf = lastIndexOf;

})();

function $H(object) {

  return new Hash(object);

};



var Hash = Class.create(Enumerable, (function() {

  function initialize(object) {

    this._object = Object.isHash(object) ? object.toObject() : Object.clone(object);

  }





  function _each(iterator) {

    for (var key in this._object) {

      var value = this._object[key], pair = [key, value];

      pair.key = key;

      pair.value = value;

      iterator(pair);

    }

  }



  function set(key, value) {

    return this._object[key] = value;

  }



  function get(key) {

    if (this._object[key] !== Object.prototype[key])

      return this._object[key];

  }



  function unset(key) {

    var value = this._object[key];

    delete this._object[key];

    return value;

  }



  function toObject() {

    return Object.clone(this._object);

  }







  function keys() {

    return this.pluck('key');

  }



  function values() {

    return this.pluck('value');

  }



  function index(value) {

    var match = this.detect(function(pair) {

      return pair.value === value;

    });

    return match && match.key;

  }



  function merge(object) {

    return this.clone().update(object);

  }



  function update(object) {

    return new Hash(object).inject(this, function(result, pair) {

      result.set(pair.key, pair.value);

      return result;

    });

  }



  function toQueryPair(key, value) {

    if (Object.isUndefined(value)) return key;

    return key + '=' + encodeURIComponent(String.interpret(value));

  }



  function toQueryString() {

    return this.inject([], function(results, pair) {

      var key = encodeURIComponent(pair.key), values = pair.value;



      if (values && typeof values == 'object') {

        if (Object.isArray(values)) {

          var queryValues = [];

          for (var i = 0, len = values.length, value; i < len; i++) {

            value = values[i];

            queryValues.push(toQueryPair(key, value));

          }

          return results.concat(queryValues);

        }

      } else results.push(toQueryPair(key, values));

      return results;

    }).join('&');

  }



  function inspect() {

    return '#<Hash:{' + this.map(function(pair) {

      return pair.map(Object.inspect).join(': ');

    }).join(', ') + '}>';

  }



  function clone() {

    return new Hash(this);

  }



  return {

    initialize:             initialize,

    _each:                  _each,

    set:                    set,

    get:                    get,

    unset:                  unset,

    toObject:               toObject,

    toTemplateReplacements: toObject,

    keys:                   keys,

    values:                 values,

    index:                  index,

    merge:                  merge,

    update:                 update,

    toQueryString:          toQueryString,

    inspect:                inspect,

    toJSON:                 toObject,

    clone:                  clone

  };

})());



Hash.from = $H;

Object.extend(Number.prototype, (function() {

  function toColorPart() {

    return this.toPaddedString(2, 16);

  }



  function succ() {

    return this + 1;

  }



  function times(iterator, context) {

    $R(0, this, true).each(iterator, context);

    return this;

  }



  function toPaddedString(length, radix) {

    var string = this.toString(radix || 10);

    return '0'.times(length - string.length) + string;

  }



  function abs() {

    return Math.abs(this);

  }



  function round() {

    return Math.round(this);

  }



  function ceil() {

    return Math.ceil(this);

  }



  function floor() {

    return Math.floor(this);

  }



  return {

    toColorPart:    toColorPart,

    succ:           succ,

    times:          times,

    toPaddedString: toPaddedString,

    abs:            abs,

    round:          round,

    ceil:           ceil,

    floor:          floor

  };

})());



function $R(start, end, exclusive) {

  return new ObjectRange(start, end, exclusive);

}



var ObjectRange = Class.create(Enumerable, (function() {

  function initialize(start, end, exclusive) {

    this.start = start;

    this.end = end;

    this.exclusive = exclusive;

  }



  function _each(iterator) {

    var value = this.start;

    while (this.include(value)) {

      iterator(value);

      value = value.succ();

    }

  }



  function include(value) {

    if (value < this.start)

      return false;

    if (this.exclusive)

      return value < this.end;

    return value <= this.end;

  }



  return {

    initialize: initialize,

    _each:      _each,

    include:    include

  };

})());







var Abstract = { };





var Try = {

  these: function() {

    var returnValue;



    for (var i = 0, length = arguments.length; i < length; i++) {

      var lambda = arguments[i];

      try {

        returnValue = lambda();

        break;

      } catch (e) { }

    }



    return returnValue;

  }

};



var Ajax = {

  getTransport: function() {

    return Try.these(

      function() {return new XMLHttpRequest()},

      function() {return new ActiveXObject('Msxml2.XMLHTTP')},

      function() {return new ActiveXObject('Microsoft.XMLHTTP')}

    ) || false;

  },



  activeRequestCount: 0

};



Ajax.Responders = {

  responders: [],



  _each: function(iterator) {

    this.responders._each(iterator);

  },



  register: function(responder) {

    if (!this.include(responder))

      this.responders.push(responder);

  },



  unregister: function(responder) {

    this.responders = this.responders.without(responder);

  },



  dispatch: function(callback, request, transport, json) {

    this.each(function(responder) {

      if (Object.isFunction(responder[callback])) {

        try {

          responder[callback].apply(responder, [request, transport, json]);

        } catch (e) { }

      }

    });

  }

};



Object.extend(Ajax.Responders, Enumerable);



Ajax.Responders.register({

  onCreate:   function() { Ajax.activeRequestCount++ },

  onComplete: function() { Ajax.activeRequestCount-- }

});

Ajax.Base = Class.create({

  initialize: function(options) {

    this.options = {

      method:       'post',

      asynchronous: true,

      contentType:  'application/x-www-form-urlencoded',

      encoding:     'UTF-8',

      parameters:   '',

      evalJSON:     true,

      evalJS:       true

    };

    Object.extend(this.options, options || { });



    this.options.method = this.options.method.toLowerCase();



    if (Object.isHash(this.options.parameters))

      this.options.parameters = this.options.parameters.toObject();

  }

});

Ajax.Request = Class.create(Ajax.Base, {

  _complete: false,



  initialize: function($super, url, options) {

    $super(options);

    this.transport = Ajax.getTransport();

    this.request(url);

  },



  request: function(url) {

    this.url = url;

    this.method = this.options.method;

    var params = Object.isString(this.options.parameters) ?

          this.options.parameters :

          Object.toQueryString(this.options.parameters);



    if (!['get', 'post'].include(this.method)) {

      params += (params ? '&' : '') + "_method=" + this.method;

      this.method = 'post';

    }



    if (params && this.method === 'get') {

      this.url += (this.url.include('?') ? '&' : '?') + params;

    }



    this.parameters = params.toQueryParams();



    try {

      var response = new Ajax.Response(this);

      if (this.options.onCreate) this.options.onCreate(response);

      Ajax.Responders.dispatch('onCreate', this, response);



      this.transport.open(this.method.toUpperCase(), this.url,

        this.options.asynchronous);



      if (this.options.asynchronous) this.respondToReadyState.bind(this).defer(1);



      this.transport.onreadystatechange = this.onStateChange.bind(this);

      this.setRequestHeaders();



      this.body = this.method == 'post' ? (this.options.postBody || params) : null;

      this.transport.send(this.body);



      /* Force Firefox to handle ready state 4 for synchronous requests */

      if (!this.options.asynchronous && this.transport.overrideMimeType)

        this.onStateChange();



    }

    catch (e) {

      this.dispatchException(e);

    }

  },



  onStateChange: function() {

    var readyState = this.transport.readyState;

    if (readyState > 1 && !((readyState == 4) && this._complete))

      this.respondToReadyState(this.transport.readyState);

  },



  setRequestHeaders: function() {

    var headers = {

      'X-Requested-With': 'XMLHttpRequest',

      'X-Prototype-Version': Prototype.Version,

      'Accept': 'text/javascript, text/html, application/xml, text/xml, */*'

    };



    if (this.method == 'post') {

      headers['Content-type'] = this.options.contentType +

        (this.options.encoding ? '; charset=' + this.options.encoding : '');



      /* Force "Connection: close" for older Mozilla browsers to work

       * around a bug where XMLHttpRequest sends an incorrect

       * Content-length header. See Mozilla Bugzilla #246651.

       */

      if (this.transport.overrideMimeType &&

          (navigator.userAgent.match(/Gecko\/(\d{4})/) || [0,2005])[1] < 2005)

            headers['Connection'] = 'close';

    }



    if (typeof this.options.requestHeaders == 'object') {

      var extras = this.options.requestHeaders;



      if (Object.isFunction(extras.push))

        for (var i = 0, length = extras.length; i < length; i += 2)

          headers[extras[i]] = extras[i+1];

      else

        $H(extras).each(function(pair) { headers[pair.key] = pair.value });

    }



    for (var name in headers)

      this.transport.setRequestHeader(name, headers[name]);

  },



  success: function() {

    var status = this.getStatus();

    return !status || (status >= 200 && status < 300) || status == 304;

  },



  getStatus: function() {

    try {

      if (this.transport.status === 1223) return 204;

      return this.transport.status || 0;

    } catch (e) { return 0 }

  },



  respondToReadyState: function(readyState) {

    var state = Ajax.Request.Events[readyState], response = new Ajax.Response(this);



    if (state == 'Complete') {

      try {

        this._complete = true;

        (this.options['on' + response.status]

         || this.options['on' + (this.success() ? 'Success' : 'Failure')]

         || Prototype.emptyFunction)(response, response.headerJSON);

      } catch (e) {

        this.dispatchException(e);

      }



      var contentType = response.getHeader('Content-type');

      if (this.options.evalJS == 'force'

          || (this.options.evalJS && this.isSameOrigin() && contentType

          && contentType.match(/^\s*(text|application)\/(x-)?(java|ecma)script(;.*)?\s*$/i)))

        this.evalResponse();

    }



    try {

      (this.options['on' + state] || Prototype.emptyFunction)(response, response.headerJSON);

      Ajax.Responders.dispatch('on' + state, this, response, response.headerJSON);

    } catch (e) {

      this.dispatchException(e);

    }



    if (state == 'Complete') {

      this.transport.onreadystatechange = Prototype.emptyFunction;

    }

  },



  isSameOrigin: function() {

    var m = this.url.match(/^\s*https?:\/\/[^\/]*/);

    return !m || (m[0] == '#{protocol}//#{domain}#{port}'.interpolate({

      protocol: location.protocol,

      domain: document.domain,

      port: location.port ? ':' + location.port : ''

    }));

  },



  getHeader: function(name) {

    try {

      return this.transport.getResponseHeader(name) || null;

    } catch (e) { return null; }

  },



  evalResponse: function() {

    try {

      return eval((this.transport.responseText || '').unfilterJSON());

    } catch (e) {

      this.dispatchException(e);

    }

  },



  dispatchException: function(exception) {

    (this.options.onException || Prototype.emptyFunction)(this, exception);

    Ajax.Responders.dispatch('onException', this, exception);

  }

});



Ajax.Request.Events =

  ['Uninitialized', 'Loading', 'Loaded', 'Interactive', 'Complete'];

















Ajax.Response = Class.create({

  initialize: function(request){

    this.request = request;

    var transport  = this.transport  = request.transport,

        readyState = this.readyState = transport.readyState;



    if ((readyState > 2 && !Prototype.Browser.IE) || readyState == 4) {

      this.status       = this.getStatus();

      this.statusText   = this.getStatusText();

      this.responseText = String.interpret(transport.responseText);

      this.headerJSON   = this._getHeaderJSON();

    }



    if (readyState == 4) {

      var xml = transport.responseXML;

      this.responseXML  = Object.isUndefined(xml) ? null : xml;

      this.responseJSON = this._getResponseJSON();

    }

  },



  status:      0,



  statusText: '',



  getStatus: Ajax.Request.prototype.getStatus,



  getStatusText: function() {

    try {

      return this.transport.statusText || '';

    } catch (e) { return '' }

  },



  getHeader: Ajax.Request.prototype.getHeader,



  getAllHeaders: function() {

    try {

      return this.getAllResponseHeaders();

    } catch (e) { return null }

  },



  getResponseHeader: function(name) {

    return this.transport.getResponseHeader(name);

  },



  getAllResponseHeaders: function() {

    return this.transport.getAllResponseHeaders();

  },



  _getHeaderJSON: function() {

    var json = this.getHeader('X-JSON');

    if (!json) return null;

    json = decodeURIComponent(escape(json));

    try {

      return json.evalJSON(this.request.options.sanitizeJSON ||

        !this.request.isSameOrigin());

    } catch (e) {

      this.request.dispatchException(e);

    }

  },



  _getResponseJSON: function() {

    var options = this.request.options;

    if (!options.evalJSON || (options.evalJSON != 'force' &&

      !(this.getHeader('Content-type') || '').include('application/json')) ||

        this.responseText.blank())

          return null;

    try {

      return this.responseText.evalJSON(options.sanitizeJSON ||

        !this.request.isSameOrigin());

    } catch (e) {

      this.request.dispatchException(e);

    }

  }

});



Ajax.Updater = Class.create(Ajax.Request, {

  initialize: function($super, container, url, options) {

    this.container = {

      success: (container.success || container),

      failure: (container.failure || (container.success ? null : container))

    };



    options = Object.clone(options);

    var onComplete = options.onComplete;

    options.onComplete = (function(response, json) {

      this.updateContent(response.responseText);

      if (Object.isFunction(onComplete)) onComplete(response, json);

    }).bind(this);



    $super(url, options);

  },



  updateContent: function(responseText) {

    var receiver = this.container[this.success() ? 'success' : 'failure'],

        options = this.options;



    if (!options.evalScripts) responseText = responseText.stripScripts();



    if (receiver = $(receiver)) {

      if (options.insertion) {

        if (Object.isString(options.insertion)) {

          var insertion = { }; insertion[options.insertion] = responseText;

          receiver.insert(insertion);

        }

        else options.insertion(receiver, responseText);

      }

      else receiver.update(responseText);

    }

  }

});



Ajax.PeriodicalUpdater = Class.create(Ajax.Base, {

  initialize: function($super, container, url, options) {

    $super(options);

    this.onComplete = this.options.onComplete;



    this.frequency = (this.options.frequency || 2);

    this.decay = (this.options.decay || 1);



    this.updater = { };

    this.container = container;

    this.url = url;



    this.start();

  },



  start: function() {

    this.options.onComplete = this.updateComplete.bind(this);

    this.onTimerEvent();

  },



  stop: function() {

    this.updater.options.onComplete = undefined;

    clearTimeout(this.timer);

    (this.onComplete || Prototype.emptyFunction).apply(this, arguments);

  },



  updateComplete: function(response) {

    if (this.options.decay) {

      this.decay = (response.responseText == this.lastText ?

        this.decay * this.options.decay : 1);



      this.lastText = response.responseText;

    }

    this.timer = this.onTimerEvent.bind(this).delay(this.decay * this.frequency);

  },



  onTimerEvent: function() {

    this.updater = new Ajax.Updater(this.container, this.url, this.options);

  }

});





function $(element) {

  if (arguments.length > 1) {

    for (var i = 0, elements = [], length = arguments.length; i < length; i++)

      elements.push($(arguments[i]));

    return elements;

  }

  if (Object.isString(element))

    element = document.getElementById(element);

  return Element.extend(element);

}



if (Prototype.BrowserFeatures.XPath) {

  document._getElementsByXPath = function(expression, parentElement) {

    var results = [];

    var query = document.evaluate(expression, $(parentElement) || document,

      null, XPathResult.ORDERED_NODE_SNAPSHOT_TYPE, null);

    for (var i = 0, length = query.snapshotLength; i < length; i++)

      results.push(Element.extend(query.snapshotItem(i)));

    return results;

  };

}



/*--------------------------------------------------------------------------*/



if (!Node) var Node = { };



if (!Node.ELEMENT_NODE) {

  Object.extend(Node, {

    ELEMENT_NODE: 1,

    ATTRIBUTE_NODE: 2,

    TEXT_NODE: 3,

    CDATA_SECTION_NODE: 4,

    ENTITY_REFERENCE_NODE: 5,

    ENTITY_NODE: 6,

    PROCESSING_INSTRUCTION_NODE: 7,

    COMMENT_NODE: 8,

    DOCUMENT_NODE: 9,

    DOCUMENT_TYPE_NODE: 10,

    DOCUMENT_FRAGMENT_NODE: 11,

    NOTATION_NODE: 12

  });

}







(function(global) {

  function shouldUseCache(tagName, attributes) {

    if (tagName === 'select') return false;

    if ('type' in attributes) return false;

    return true;

  }



  var HAS_EXTENDED_CREATE_ELEMENT_SYNTAX = (function(){

    try {

      var el = document.createElement('<input name="x">');

      return el.tagName.toLowerCase() === 'input' && el.name === 'x';

    }

    catch(err) {

      return false;

    }

  })();



  var element = global.Element;



  global.Element = function(tagName, attributes) {

    attributes = attributes || { };

    tagName = tagName.toLowerCase();

    var cache = Element.cache;



    if (HAS_EXTENDED_CREATE_ELEMENT_SYNTAX && attributes.name) {

      tagName = '<' + tagName + ' name="' + attributes.name + '">';

      delete attributes.name;

      return Element.writeAttribute(document.createElement(tagName), attributes);

    }



    if (!cache[tagName]) cache[tagName] = Element.extend(document.createElement(tagName));



    var node = shouldUseCache(tagName, attributes) ?

     cache[tagName].cloneNode(false) : document.createElement(tagName);



    return Element.writeAttribute(node, attributes);

  };



  Object.extend(global.Element, element || { });

  if (element) global.Element.prototype = element.prototype;



})(this);



Element.idCounter = 1;

Element.cache = { };



Element._purgeElement = function(element) {

  var uid = element._prototypeUID;

  if (uid) {

    Element.stopObserving(element);

    element._prototypeUID = void 0;

    delete Element.Storage[uid];

  }

}



Element.Methods = {

  visible: function(element) {

    return $(element).style.display != 'none';

  },



  toggle: function(element) {

    element = $(element);

    Element[Element.visible(element) ? 'hide' : 'show'](element);

    return element;

  },



  hide: function(element) {

    element = $(element);

    element.style.display = 'none';

    return element;

  },



  show: function(element) {

    element = $(element);

    element.style.display = '';

    return element;

  },



  remove: function(element) {

    element = $(element);

    element.parentNode.removeChild(element);

    return element;

  },



  update: (function(){



    var SELECT_ELEMENT_INNERHTML_BUGGY = (function(){

      var el = document.createElement("select"),

          isBuggy = true;

      el.innerHTML = "<option value=\"test\">test</option>";

      if (el.options && el.options[0]) {

        isBuggy = el.options[0].nodeName.toUpperCase() !== "OPTION";

      }

      el = null;

      return isBuggy;

    })();



    var TABLE_ELEMENT_INNERHTML_BUGGY = (function(){

      try {

        var el = document.createElement("table");

        if (el && el.tBodies) {

          el.innerHTML = "<tbody><tr><td>test</td></tr></tbody>";

          var isBuggy = typeof el.tBodies[0] == "undefined";

          el = null;

          return isBuggy;

        }

      } catch (e) {

        return true;

      }

    })();



    var LINK_ELEMENT_INNERHTML_BUGGY = (function() {

      try {

        var el = document.createElement('div');

        el.innerHTML = "<link>";

        var isBuggy = (el.childNodes.length === 0);

        el = null;

        return isBuggy;

      } catch(e) {

        return true;

      }

    })();



    var ANY_INNERHTML_BUGGY = SELECT_ELEMENT_INNERHTML_BUGGY ||

     TABLE_ELEMENT_INNERHTML_BUGGY || LINK_ELEMENT_INNERHTML_BUGGY;



    var SCRIPT_ELEMENT_REJECTS_TEXTNODE_APPENDING = (function () {

      var s = document.createElement("script"),

          isBuggy = false;

      try {

        s.appendChild(document.createTextNode(""));

        isBuggy = !s.firstChild ||

          s.firstChild && s.firstChild.nodeType !== 3;

      } catch (e) {

        isBuggy = true;

      }

      s = null;

      return isBuggy;

    })();





    function update(element, content) {

      element = $(element);

      var purgeElement = Element._purgeElement;



      var descendants = element.getElementsByTagName('*'),

       i = descendants.length;

      while (i--) purgeElement(descendants[i]);



      if (content && content.toElement)

        content = content.toElement();



      if (Object.isElement(content))

        return element.update().insert(content);



      content = Object.toHTML(content);



      var tagName = element.tagName.toUpperCase();



      if (tagName === 'SCRIPT' && SCRIPT_ELEMENT_REJECTS_TEXTNODE_APPENDING) {

        element.text = content;

        return element;

      }



      if (ANY_INNERHTML_BUGGY) {

        if (tagName in Element._insertionTranslations.tags) {

          while (element.firstChild) {

            element.removeChild(element.firstChild);

          }

          Element._getContentFromAnonymousElement(tagName, content.stripScripts())

            .each(function(node) {

              element.appendChild(node)

            });

        } else if (LINK_ELEMENT_INNERHTML_BUGGY && Object.isString(content) && content.indexOf('<link') > -1) {

          while (element.firstChild) {

            element.removeChild(element.firstChild);

          }

          var nodes = Element._getContentFromAnonymousElement(tagName, content.stripScripts(), true);

          nodes.each(function(node) { element.appendChild(node) });

        }

        else {

          element.innerHTML = content.stripScripts();

        }

      }

      else {

        element.innerHTML = content.stripScripts();

      }



      content.evalScripts.bind(content).defer();

      return element;

    }



    return update;

  })(),



  replace: function(element, content) {

    element = $(element);

    if (content && content.toElement) content = content.toElement();

    else if (!Object.isElement(content)) {

      content = Object.toHTML(content);

      var range = element.ownerDocument.createRange();

      range.selectNode(element);

      content.evalScripts.bind(content).defer();

      content = range.createContextualFragment(content.stripScripts());

    }

    element.parentNode.replaceChild(content, element);

    return element;

  },



  insert: function(element, insertions) {

    element = $(element);



    if (Object.isString(insertions) || Object.isNumber(insertions) ||

        Object.isElement(insertions) || (insertions && (insertions.toElement || insertions.toHTML)))

          insertions = {bottom:insertions};



    var content, insert, tagName, childNodes;



    for (var position in insertions) {

      content  = insertions[position];

      position = position.toLowerCase();

      insert = Element._insertionTranslations[position];



      if (content && content.toElement) content = content.toElement();

      if (Object.isElement(content)) {

        insert(element, content);

        continue;

      }



      content = Object.toHTML(content);



      tagName = ((position == 'before' || position == 'after')

        ? element.parentNode : element).tagName.toUpperCase();



      childNodes = Element._getContentFromAnonymousElement(tagName, content.stripScripts());



      if (position == 'top' || position == 'after') childNodes.reverse();

      childNodes.each(insert.curry(element));



      content.evalScripts.bind(content).defer();

    }



    return element;

  },



  wrap: function(element, wrapper, attributes) {

    element = $(element);

    if (Object.isElement(wrapper))

      $(wrapper).writeAttribute(attributes || { });

    else if (Object.isString(wrapper)) wrapper = new Element(wrapper, attributes);

    else wrapper = new Element('div', wrapper);

    if (element.parentNode)

      element.parentNode.replaceChild(wrapper, element);

    wrapper.appendChild(element);

    return wrapper;

  },



  inspect: function(element) {

    element = $(element);

    var result = '<' + element.tagName.toLowerCase();

    $H({'id': 'id', 'className': 'class'}).each(function(pair) {

      var property = pair.first(),

          attribute = pair.last(),

          value = (element[property] || '').toString();

      if (value) result += ' ' + attribute + '=' + value.inspect(true);

    });

    return result + '>';

  },



  recursivelyCollect: function(element, property, maximumLength) {

    element = $(element);

    maximumLength = maximumLength || -1;

    var elements = [];



    while (element = element[property]) {

      if (element.nodeType == 1)

        elements.push(Element.extend(element));

      if (elements.length == maximumLength)

        break;

    }



    return elements;

  },



  ancestors: function(element) {

    return Element.recursivelyCollect(element, 'parentNode');

  },



  descendants: function(element) {

    return Element.select(element, "*");

  },



  firstDescendant: function(element) {

    element = $(element).firstChild;

    while (element && element.nodeType != 1) element = element.nextSibling;

    return $(element);

  },



  immediateDescendants: function(element) {

    var results = [], child = $(element).firstChild;

    while (child) {

      if (child.nodeType === 1) {

        results.push(Element.extend(child));

      }

      child = child.nextSibling;

    }

    return results;

  },



  previousSiblings: function(element, maximumLength) {

    return Element.recursivelyCollect(element, 'previousSibling');

  },



  nextSiblings: function(element) {

    return Element.recursivelyCollect(element, 'nextSibling');

  },



  siblings: function(element) {

    element = $(element);

    return Element.previousSiblings(element).reverse()

      .concat(Element.nextSiblings(element));

  },



  match: function(element, selector) {

    element = $(element);

    if (Object.isString(selector))

      return Prototype.Selector.match(element, selector);

    return selector.match(element);

  },



  up: function(element, expression, index) {

    element = $(element);

    if (arguments.length == 1) return $(element.parentNode);

    var ancestors = Element.ancestors(element);

    return Object.isNumber(expression) ? ancestors[expression] :

      Prototype.Selector.find(ancestors, expression, index);

  },



  down: function(element, expression, index) {

    element = $(element);

    if (arguments.length == 1) return Element.firstDescendant(element);

    return Object.isNumber(expression) ? Element.descendants(element)[expression] :

      Element.select(element, expression)[index || 0];

  },



  previous: function(element, expression, index) {

    element = $(element);

    if (Object.isNumber(expression)) index = expression, expression = false;

    if (!Object.isNumber(index)) index = 0;



    if (expression) {

      return Prototype.Selector.find(element.previousSiblings(), expression, index);

    } else {

      return element.recursivelyCollect("previousSibling", index + 1)[index];

    }

  },



  next: function(element, expression, index) {

    element = $(element);

    if (Object.isNumber(expression)) index = expression, expression = false;

    if (!Object.isNumber(index)) index = 0;



    if (expression) {

      return Prototype.Selector.find(element.nextSiblings(), expression, index);

    } else {

      var maximumLength = Object.isNumber(index) ? index + 1 : 1;

      return element.recursivelyCollect("nextSibling", index + 1)[index];

    }

  },





  select: function(element) {

    element = $(element);

    var expressions = Array.prototype.slice.call(arguments, 1).join(', ');

    return Prototype.Selector.select(expressions, element);

  },



  adjacent: function(element) {

    element = $(element);

    var expressions = Array.prototype.slice.call(arguments, 1).join(', ');

    return Prototype.Selector.select(expressions, element.parentNode).without(element);

  },



  identify: function(element) {

    element = $(element);

    var id = Element.readAttribute(element, 'id');

    if (id) return id;

    do { id = 'anonymous_element_' + Element.idCounter++ } while ($(id));

    Element.writeAttribute(element, 'id', id);

    return id;

  },



  readAttribute: function(element, name) {

    element = $(element);

    if (Prototype.Browser.IE) {

      var t = Element._attributeTranslations.read;

      if (t.values[name]) return t.values[name](element, name);

      if (t.names[name]) name = t.names[name];

      if (name.include(':')) {

        return (!element.attributes || !element.attributes[name]) ? null :

         element.attributes[name].value;

      }

    }

    return element.getAttribute(name);

  },



  writeAttribute: function(element, name, value) {

    element = $(element);

    var attributes = { }, t = Element._attributeTranslations.write;



    if (typeof name == 'object') attributes = name;

    else attributes[name] = Object.isUndefined(value) ? true : value;



    for (var attr in attributes) {

      name = t.names[attr] || attr;

      value = attributes[attr];

      if (t.values[attr]) name = t.values[attr](element, value);

      if (value === false || value === null)

        element.removeAttribute(name);

      else if (value === true)

        element.setAttribute(name, name);

      else element.setAttribute(name, value);

    }

    return element;

  },



  getHeight: function(element) {

    return Element.getDimensions(element).height;

  },



  getWidth: function(element) {

    return Element.getDimensions(element).width;

  },



  classNames: function(element) {

    return new Element.ClassNames(element);

  },



  hasClassName: function(element, className) {

    if (!(element = $(element))) return;

    var elementClassName = element.className;

    return (elementClassName.length > 0 && (elementClassName == className ||

      new RegExp("(^|\\s)" + className + "(\\s|$)").test(elementClassName)));

  },



  addClassName: function(element, className) {

    if (!(element = $(element))) return;

    if (!Element.hasClassName(element, className))

      element.className += (element.className ? ' ' : '') + className;

    return element;

  },



  removeClassName: function(element, className) {

    if (!(element = $(element))) return;

    element.className = element.className.replace(

      new RegExp("(^|\\s+)" + className + "(\\s+|$)"), ' ').strip();

    return element;

  },



  toggleClassName: function(element, className) {

    if (!(element = $(element))) return;

    return Element[Element.hasClassName(element, className) ?

      'removeClassName' : 'addClassName'](element, className);

  },



  cleanWhitespace: function(element) {

    element = $(element);

    var node = element.firstChild;

    while (node) {

      var nextNode = node.nextSibling;

      if (node.nodeType == 3 && !/\S/.test(node.nodeValue))

        element.removeChild(node);

      node = nextNode;

    }

    return element;

  },



  empty: function(element) {

    return $(element).innerHTML.blank();

  },



  descendantOf: function(element, ancestor) {

    element = $(element), ancestor = $(ancestor);



    if (element.compareDocumentPosition)

      return (element.compareDocumentPosition(ancestor) & 8) === 8;



    if (ancestor.contains)

      return ancestor.contains(element) && ancestor !== element;



    while (element = element.parentNode)

      if (element == ancestor) return true;



    return false;

  },



  scrollTo: function(element) {

    element = $(element);

    var pos = Element.cumulativeOffset(element);

    window.scrollTo(pos[0], pos[1]);

    return element;

  },



  getStyle: function(element, style) {

    element = $(element);

    style = style == 'float' ? 'cssFloat' : style.camelize();

    var value = element.style[style];

    if (!value || value == 'auto') {

      var css = document.defaultView.getComputedStyle(element, null);

      value = css ? css[style] : null;

    }

    if (style == 'opacity') return value ? parseFloat(value) : 1.0;

    return value == 'auto' ? null : value;

  },



  getOpacity: function(element) {

    return $(element).getStyle('opacity');

  },



  setStyle: function(element, styles) {

    element = $(element);

    var elementStyle = element.style, match;

    if (Object.isString(styles)) {

      element.style.cssText += ';' + styles;

      return styles.include('opacity') ?

        element.setOpacity(styles.match(/opacity:\s*(\d?\.?\d*)/)[1]) : element;

    }

    for (var property in styles)

      if (property == 'opacity') element.setOpacity(styles[property]);

      else

        elementStyle[(property == 'float' || property == 'cssFloat') ?

          (Object.isUndefined(elementStyle.styleFloat) ? 'cssFloat' : 'styleFloat') :

            property] = styles[property];



    return element;

  },



  setOpacity: function(element, value) {

    element = $(element);

    element.style.opacity = (value == 1 || value === '') ? '' :

      (value < 0.00001) ? 0 : value;

    return element;

  },



  makePositioned: function(element) {

    element = $(element);

    var pos = Element.getStyle(element, 'position');

    if (pos == 'static' || !pos) {

      element._madePositioned = true;

      element.style.position = 'relative';

      if (Prototype.Browser.Opera) {

        element.style.top = 0;

        element.style.left = 0;

      }

    }

    return element;

  },



  undoPositioned: function(element) {

    element = $(element);

    if (element._madePositioned) {

      element._madePositioned = undefined;

      element.style.position =

        element.style.top =

        element.style.left =

        element.style.bottom =

        element.style.right = '';

    }

    return element;

  },



  makeClipping: function(element) {

    element = $(element);

    if (element._overflow) return element;

    element._overflow = Element.getStyle(element, 'overflow') || 'auto';

    if (element._overflow !== 'hidden')

      element.style.overflow = 'hidden';

    return element;

  },



  undoClipping: function(element) {

    element = $(element);

    if (!element._overflow) return element;

    element.style.overflow = element._overflow == 'auto' ? '' : element._overflow;

    element._overflow = null;

    return element;

  },



  clonePosition: function(element, source) {

    var options = Object.extend({

      setLeft:    true,

      setTop:     true,

      setWidth:   true,

      setHeight:  true,

      offsetTop:  0,

      offsetLeft: 0

    }, arguments[2] || { });



    source = $(source);

    var p = Element.viewportOffset(source), delta = [0, 0], parent = null;



    element = $(element);



    if (Element.getStyle(element, 'position') == 'absolute') {

      parent = Element.getOffsetParent(element);

      delta = Element.viewportOffset(parent);

    }



    if (parent == document.body) {

      delta[0] -= document.body.offsetLeft;

      delta[1] -= document.body.offsetTop;

    }



    if (options.setLeft)   element.style.left  = (p[0] - delta[0] + options.offsetLeft) + 'px';

    if (options.setTop)    element.style.top   = (p[1] - delta[1] + options.offsetTop) + 'px';

    if (options.setWidth)  element.style.width = source.offsetWidth + 'px';

    if (options.setHeight) element.style.height = source.offsetHeight + 'px';

    return element;

  }

};



Object.extend(Element.Methods, {

  getElementsBySelector: Element.Methods.select,



  childElements: Element.Methods.immediateDescendants

});



Element._attributeTranslations = {

  write: {

    names: {

      className: 'class',

      htmlFor:   'for'

    },

    values: { }

  }

};



if (Prototype.Browser.Opera) {

  Element.Methods.getStyle = Element.Methods.getStyle.wrap(

    function(proceed, element, style) {

      switch (style) {

        case 'height': case 'width':

          if (!Element.visible(element)) return null;



          var dim = parseInt(proceed(element, style), 10);



          if (dim !== element['offset' + style.capitalize()])

            return dim + 'px';



          var properties;

          if (style === 'height') {

            properties = ['border-top-width', 'padding-top',

             'padding-bottom', 'border-bottom-width'];

          }

          else {

            properties = ['border-left-width', 'padding-left',

             'padding-right', 'border-right-width'];

          }

          return properties.inject(dim, function(memo, property) {

            var val = proceed(element, property);

            return val === null ? memo : memo - parseInt(val, 10);

          }) + 'px';

        default: return proceed(element, style);

      }

    }

  );



  Element.Methods.readAttribute = Element.Methods.readAttribute.wrap(

    function(proceed, element, attribute) {

      if (attribute === 'title') return element.title;

      return proceed(element, attribute);

    }

  );

}



else if (Prototype.Browser.IE) {

  Element.Methods.getStyle = function(element, style) {

    element = $(element);

    style = (style == 'float' || style == 'cssFloat') ? 'styleFloat' : style.camelize();

    var value = element.style[style];

    if (!value && element.currentStyle) value = element.currentStyle[style];



    if (style == 'opacity') {

      if (value = (element.getStyle('filter') || '').match(/alpha\(opacity=(.*)\)/))

        if (value[1]) return parseFloat(value[1]) / 100;

      return 1.0;

    }



    if (value == 'auto') {

      if ((style == 'width' || style == 'height') && (element.getStyle('display') != 'none'))

        return element['offset' + style.capitalize()] + 'px';

      return null;

    }

    return value;

  };



  Element.Methods.setOpacity = function(element, value) {

    function stripAlpha(filter){

      return filter.replace(/alpha\([^\)]*\)/gi,'');

    }

    element = $(element);

    var currentStyle = element.currentStyle;

    if ((currentStyle && !currentStyle.hasLayout) ||

      (!currentStyle && element.style.zoom == 'normal'))

        element.style.zoom = 1;



    var filter = element.getStyle('filter'), style = element.style;

    if (value == 1 || value === '') {

      (filter = stripAlpha(filter)) ?

        style.filter = filter : style.removeAttribute('filter');

      return element;

    } else if (value < 0.00001) value = 0;

    style.filter = stripAlpha(filter) +

      'alpha(opacity=' + (value * 100) + ')';

    return element;

  };



  Element._attributeTranslations = (function(){



    var classProp = 'className',

        forProp = 'for',

        el = document.createElement('div');



    el.setAttribute(classProp, 'x');



    if (el.className !== 'x') {

      el.setAttribute('class', 'x');

      if (el.className === 'x') {

        classProp = 'class';

      }

    }

    el = null;



    el = document.createElement('label');

    el.setAttribute(forProp, 'x');

    if (el.htmlFor !== 'x') {

      el.setAttribute('htmlFor', 'x');

      if (el.htmlFor === 'x') {

        forProp = 'htmlFor';

      }

    }

    el = null;



    return {

      read: {

        names: {

          'class':      classProp,

          'className':  classProp,

          'for':        forProp,

          'htmlFor':    forProp

        },

        values: {

          _getAttr: function(element, attribute) {

            return element.getAttribute(attribute);

          },

          _getAttr2: function(element, attribute) {

            return element.getAttribute(attribute, 2);

          },

          _getAttrNode: function(element, attribute) {

            var node = element.getAttributeNode(attribute);

            return node ? node.value : "";

          },

          _getEv: (function(){



            var el = document.createElement('div'), f;

            el.onclick = Prototype.emptyFunction;

            var value = el.getAttribute('onclick');



            if (String(value).indexOf('{') > -1) {

              f = function(element, attribute) {

                attribute = element.getAttribute(attribute);

                if (!attribute) return null;

                attribute = attribute.toString();

                attribute = attribute.split('{')[1];

                attribute = attribute.split('}')[0];

                return attribute.strip();

              };

            }

            else if (value === '') {

              f = function(element, attribute) {

                attribute = element.getAttribute(attribute);

                if (!attribute) return null;

                return attribute.strip();

              };

            }

            el = null;

            return f;

          })(),

          _flag: function(element, attribute) {

            return $(element).hasAttribute(attribute) ? attribute : null;

          },

          style: function(element) {

            return element.style.cssText.toLowerCase();

          },

          title: function(element) {

            return element.title;

          }

        }

      }

    }

  })();



  Element._attributeTranslations.write = {

    names: Object.extend({

      cellpadding: 'cellPadding',

      cellspacing: 'cellSpacing'

    }, Element._attributeTranslations.read.names),

    values: {

      checked: function(element, value) {

        element.checked = !!value;

      },



      style: function(element, value) {

        element.style.cssText = value ? value : '';

      }

    }

  };



  Element._attributeTranslations.has = {};



  $w('colSpan rowSpan vAlign dateTime accessKey tabIndex ' +

      'encType maxLength readOnly longDesc frameBorder').each(function(attr) {

    Element._attributeTranslations.write.names[attr.toLowerCase()] = attr;

    Element._attributeTranslations.has[attr.toLowerCase()] = attr;

  });



  (function(v) {

    Object.extend(v, {

      href:        v._getAttr2,

      src:         v._getAttr2,

      type:        v._getAttr,

      action:      v._getAttrNode,

      disabled:    v._flag,

      checked:     v._flag,

      readonly:    v._flag,

      multiple:    v._flag,

      onload:      v._getEv,

      onunload:    v._getEv,

      onclick:     v._getEv,

      ondblclick:  v._getEv,

      onmousedown: v._getEv,

      onmouseup:   v._getEv,

      onmouseover: v._getEv,

      onmousemove: v._getEv,

      onmouseout:  v._getEv,

      onfocus:     v._getEv,

      onblur:      v._getEv,

      onkeypress:  v._getEv,

      onkeydown:   v._getEv,

      onkeyup:     v._getEv,

      onsubmit:    v._getEv,

      onreset:     v._getEv,

      onselect:    v._getEv,

      onchange:    v._getEv

    });

  })(Element._attributeTranslations.read.values);



  if (Prototype.BrowserFeatures.ElementExtensions) {

    (function() {

      function _descendants(element) {

        var nodes = element.getElementsByTagName('*'), results = [];

        for (var i = 0, node; node = nodes[i]; i++)

          if (node.tagName !== "!") // Filter out comment nodes.

            results.push(node);

        return results;

      }



      Element.Methods.down = function(element, expression, index) {

        element = $(element);

        if (arguments.length == 1) return element.firstDescendant();

        return Object.isNumber(expression) ? _descendants(element)[expression] :

          Element.select(element, expression)[index || 0];

      }

    })();

  }



}



else if (Prototype.Browser.Gecko && /rv:1\.8\.0/.test(navigator.userAgent)) {

  Element.Methods.setOpacity = function(element, value) {

    element = $(element);

    element.style.opacity = (value == 1) ? 0.999999 :

      (value === '') ? '' : (value < 0.00001) ? 0 : value;

    return element;

  };

}



else if (Prototype.Browser.WebKit) {

  Element.Methods.setOpacity = function(element, value) {

    element = $(element);

    element.style.opacity = (value == 1 || value === '') ? '' :

      (value < 0.00001) ? 0 : value;



    if (value == 1)

      if (element.tagName.toUpperCase() == 'IMG' && element.width) {

        element.width++; element.width--;

      } else try {

        var n = document.createTextNode(' ');

        element.appendChild(n);

        element.removeChild(n);

      } catch (e) { }



    return element;

  };

}



if ('outerHTML' in document.documentElement) {

  Element.Methods.replace = function(element, content) {

    element = $(element);



    if (content && content.toElement) content = content.toElement();

    if (Object.isElement(content)) {

      element.parentNode.replaceChild(content, element);

      return element;

    }



    content = Object.toHTML(content);

    var parent = element.parentNode, tagName = parent.tagName.toUpperCase();



    if (Element._insertionTranslations.tags[tagName]) {

      var nextSibling = element.next(),

          fragments = Element._getContentFromAnonymousElement(tagName, content.stripScripts());

      parent.removeChild(element);

      if (nextSibling)

        fragments.each(function(node) { parent.insertBefore(node, nextSibling) });

      else

        fragments.each(function(node) { parent.appendChild(node) });

    }

    else element.outerHTML = content.stripScripts();



    content.evalScripts.bind(content).defer();

    return element;

  };

}



Element._returnOffset = function(l, t) {

  var result = [l, t];

  result.left = l;

  result.top = t;

  return result;

};



Element._getContentFromAnonymousElement = function(tagName, html, force) {

  var div = new Element('div'),

      t = Element._insertionTranslations.tags[tagName];



  var workaround = false;

  if (t) workaround = true;

  else if (force) {

    workaround = true;

    t = ['', '', 0];

  }



  if (workaround) {

    div.innerHTML = '&nbsp;' + t[0] + html + t[1];

    div.removeChild(div.firstChild);

    for (var i = t[2]; i--; ) {

      div = div.firstChild;

    }

  }

  else {

    div.innerHTML = html;

  }

  return $A(div.childNodes);

};



Element._insertionTranslations = {

  before: function(element, node) {

    element.parentNode.insertBefore(node, element);

  },

  top: function(element, node) {

    element.insertBefore(node, element.firstChild);

  },

  bottom: function(element, node) {

    element.appendChild(node);

  },

  after: function(element, node) {

    element.parentNode.insertBefore(node, element.nextSibling);

  },

  tags: {

    TABLE:  ['<table>',                '</table>',                   1],

    TBODY:  ['<table><tbody>',         '</tbody></table>',           2],

    TR:     ['<table><tbody><tr>',     '</tr></tbody></table>',      3],

    TD:     ['<table><tbody><tr><td>', '</td></tr></tbody></table>', 4],

    SELECT: ['<select>',               '</select>',                  1]

  }

};



(function() {

  var tags = Element._insertionTranslations.tags;

  Object.extend(tags, {

    THEAD: tags.TBODY,

    TFOOT: tags.TBODY,

    TH:    tags.TD

  });

})();



Element.Methods.Simulated = {

  hasAttribute: function(element, attribute) {

    attribute = Element._attributeTranslations.has[attribute] || attribute;

    var node = $(element).getAttributeNode(attribute);

    return !!(node && node.specified);

  }

};



Element.Methods.ByTag = { };



Object.extend(Element, Element.Methods);



(function(div) {



  if (!Prototype.BrowserFeatures.ElementExtensions && div['__proto__']) {

    window.HTMLElement = { };

    window.HTMLElement.prototype = div['__proto__'];

    Prototype.BrowserFeatures.ElementExtensions = true;

  }



  div = null;



})(document.createElement('div'));



Element.extend = (function() {



  function checkDeficiency(tagName) {

    if (typeof window.Element != 'undefined') {

      var proto = window.Element.prototype;

      if (proto) {

        var id = '_' + (Math.random()+'').slice(2),

            el = document.createElement(tagName);

        proto[id] = 'x';

        var isBuggy = (el[id] !== 'x');

        delete proto[id];

        el = null;

        return isBuggy;

      }

    }

    return false;

  }



  function extendElementWith(element, methods) {

    for (var property in methods) {

      var value = methods[property];

      if (Object.isFunction(value) && !(property in element))

        element[property] = value.methodize();

    }

  }



  var HTMLOBJECTELEMENT_PROTOTYPE_BUGGY = checkDeficiency('object');



  if (Prototype.BrowserFeatures.SpecificElementExtensions) {

    if (HTMLOBJECTELEMENT_PROTOTYPE_BUGGY) {

      return function(element) {

        if (element && typeof element._extendedByPrototype == 'undefined') {

          var t = element.tagName;

          if (t && (/^(?:object|applet|embed)$/i.test(t))) {

            extendElementWith(element, Element.Methods);

            extendElementWith(element, Element.Methods.Simulated);

            extendElementWith(element, Element.Methods.ByTag[t.toUpperCase()]);

          }

        }

        return element;

      }

    }

    return Prototype.K;

  }



  var Methods = { }, ByTag = Element.Methods.ByTag;



  var extend = Object.extend(function(element) {

    if (!element || typeof element._extendedByPrototype != 'undefined' ||

        element.nodeType != 1 || element == window) return element;



    var methods = Object.clone(Methods),

        tagName = element.tagName.toUpperCase();



    if (ByTag[tagName]) Object.extend(methods, ByTag[tagName]);



    extendElementWith(element, methods);



    element._extendedByPrototype = Prototype.emptyFunction;

    return element;



  }, {

    refresh: function() {

      if (!Prototype.BrowserFeatures.ElementExtensions) {

        Object.extend(Methods, Element.Methods);

        Object.extend(Methods, Element.Methods.Simulated);

      }

    }

  });



  extend.refresh();

  return extend;

})();



if (document.documentElement.hasAttribute) {

  Element.hasAttribute = function(element, attribute) {

    return element.hasAttribute(attribute);

  };

}

else {

  Element.hasAttribute = Element.Methods.Simulated.hasAttribute;

}



Element.addMethods = function(methods) {

  var F = Prototype.BrowserFeatures, T = Element.Methods.ByTag;



  if (!methods) {

    Object.extend(Form, Form.Methods);

    Object.extend(Form.Element, Form.Element.Methods);

    Object.extend(Element.Methods.ByTag, {

      "FORM":     Object.clone(Form.Methods),

      "INPUT":    Object.clone(Form.Element.Methods),

      "SELECT":   Object.clone(Form.Element.Methods),

      "TEXTAREA": Object.clone(Form.Element.Methods),

      "BUTTON":   Object.clone(Form.Element.Methods)

    });

  }



  if (arguments.length == 2) {

    var tagName = methods;

    methods = arguments[1];

  }



  if (!tagName) Object.extend(Element.Methods, methods || { });

  else {

    if (Object.isArray(tagName)) tagName.each(extend);

    else extend(tagName);

  }



  function extend(tagName) {

    tagName = tagName.toUpperCase();

    if (!Element.Methods.ByTag[tagName])

      Element.Methods.ByTag[tagName] = { };

    Object.extend(Element.Methods.ByTag[tagName], methods);

  }



  function copy(methods, destination, onlyIfAbsent) {

    onlyIfAbsent = onlyIfAbsent || false;

    for (var property in methods) {

      var value = methods[property];

      if (!Object.isFunction(value)) continue;

      if (!onlyIfAbsent || !(property in destination))

        destination[property] = value.methodize();

    }

  }



  function findDOMClass(tagName) {

    var klass;

    var trans = {

      "OPTGROUP": "OptGroup", "TEXTAREA": "TextArea", "P": "Paragraph",

      "FIELDSET": "FieldSet", "UL": "UList", "OL": "OList", "DL": "DList",

      "DIR": "Directory", "H1": "Heading", "H2": "Heading", "H3": "Heading",

      "H4": "Heading", "H5": "Heading", "H6": "Heading", "Q": "Quote",

      "INS": "Mod", "DEL": "Mod", "A": "Anchor", "IMG": "Image", "CAPTION":

      "TableCaption", "COL": "TableCol", "COLGROUP": "TableCol", "THEAD":

      "TableSection", "TFOOT": "TableSection", "TBODY": "TableSection", "TR":

      "TableRow", "TH": "TableCell", "TD": "TableCell", "FRAMESET":

      "FrameSet", "IFRAME": "IFrame"

    };

    if (trans[tagName]) klass = 'HTML' + trans[tagName] + 'Element';

    if (window[klass]) return window[klass];

    klass = 'HTML' + tagName + 'Element';

    if (window[klass]) return window[klass];

    klass = 'HTML' + tagName.capitalize() + 'Element';

    if (window[klass]) return window[klass];



    var element = document.createElement(tagName),

        proto = element['__proto__'] || element.constructor.prototype;



    element = null;

    return proto;

  }



  var elementPrototype = window.HTMLElement ? HTMLElement.prototype :

   Element.prototype;



  if (F.ElementExtensions) {

    copy(Element.Methods, elementPrototype);

    copy(Element.Methods.Simulated, elementPrototype, true);

  }



  if (F.SpecificElementExtensions) {

    for (var tag in Element.Methods.ByTag) {

      var klass = findDOMClass(tag);

      if (Object.isUndefined(klass)) continue;

      copy(T[tag], klass.prototype);

    }

  }



  Object.extend(Element, Element.Methods);

  delete Element.ByTag;



  if (Element.extend.refresh) Element.extend.refresh();

  Element.cache = { };

};





document.viewport = {



  getDimensions: function() {

    return { width: this.getWidth(), height: this.getHeight() };

  },



  getScrollOffsets: function() {

    return Element._returnOffset(

      window.pageXOffset || document.documentElement.scrollLeft || document.body.scrollLeft,

      window.pageYOffset || document.documentElement.scrollTop  || document.body.scrollTop);

  }

};



(function(viewport) {

  var B = Prototype.Browser, doc = document, element, property = {};



  function getRootElement() {

    if (B.WebKit && !doc.evaluate)

      return document;



    if (B.Opera && window.parseFloat(window.opera.version()) < 9.5)

      return document.body;



    return document.documentElement;

  }



  function define(D) {

    if (!element) element = getRootElement();



    property[D] = 'client' + D;



    viewport['get' + D] = function() { return element[property[D]] };

    return viewport['get' + D]();

  }



  viewport.getWidth  = define.curry('Width');



  viewport.getHeight = define.curry('Height');

})(document.viewport);





Element.Storage = {

  UID: 1

};



Element.addMethods({

  getStorage: function(element) {

    if (!(element = $(element))) return;



    var uid;

    if (element === window) {

      uid = 0;

    } else {

      if (typeof element._prototypeUID === "undefined")

        element._prototypeUID = Element.Storage.UID++;

      uid = element._prototypeUID;

    }



    if (!Element.Storage[uid])

      Element.Storage[uid] = $H();



    return Element.Storage[uid];

  },



  store: function(element, key, value) {

    if (!(element = $(element))) return;



    if (arguments.length === 2) {

      Element.getStorage(element).update(key);

    } else {

      Element.getStorage(element).set(key, value);

    }



    return element;

  },



  retrieve: function(element, key, defaultValue) {

    if (!(element = $(element))) return;

    var hash = Element.getStorage(element), value = hash.get(key);



    if (Object.isUndefined(value)) {

      hash.set(key, defaultValue);

      value = defaultValue;

    }



    return value;

  },



  clone: function(element, deep) {

    if (!(element = $(element))) return;

    var clone = element.cloneNode(deep);

    clone._prototypeUID = void 0;

    if (deep) {

      var descendants = Element.select(clone, '*'),

          i = descendants.length;

      while (i--) {

        descendants[i]._prototypeUID = void 0;

      }

    }

    return Element.extend(clone);

  },



  purge: function(element) {

    if (!(element = $(element))) return;

    var purgeElement = Element._purgeElement;



    purgeElement(element);



    var descendants = element.getElementsByTagName('*'),

     i = descendants.length;



    while (i--) purgeElement(descendants[i]);



    return null;

  }

});



(function() {



  function toDecimal(pctString) {

    var match = pctString.match(/^(\d+)%?$/i);

    if (!match) return null;

    return (Number(match[1]) / 100);

  }



  function getPixelValue(value, property, context) {

    var element = null;

    if (Object.isElement(value)) {

      element = value;

      value = element.getStyle(property);

    }



    if (value === null) {

      return null;

    }



    if ((/^(?:-)?\d+(\.\d+)?(px)?$/i).test(value)) {

      return window.parseFloat(value);

    }



    var isPercentage = value.include('%'), isViewport = (context === document.viewport);



    if (/\d/.test(value) && element && element.runtimeStyle && !(isPercentage && isViewport)) {

      var style = element.style.left, rStyle = element.runtimeStyle.left;

      element.runtimeStyle.left = element.currentStyle.left;

      element.style.left = value || 0;

      value = element.style.pixelLeft;

      element.style.left = style;

      element.runtimeStyle.left = rStyle;



      return value;

    }



    if (element && isPercentage) {

      context = context || element.parentNode;

      var decimal = toDecimal(value);

      var whole = null;

      var position = element.getStyle('position');



      var isHorizontal = property.include('left') || property.include('right') ||

       property.include('width');



      var isVertical =  property.include('top') || property.include('bottom') ||

        property.include('height');



      if (context === document.viewport) {

        if (isHorizontal) {

          whole = document.viewport.getWidth();

        } else if (isVertical) {

          whole = document.viewport.getHeight();

        }

      } else {

        if (isHorizontal) {

          whole = $(context).measure('width');

        } else if (isVertical) {

          whole = $(context).measure('height');

        }

      }



      return (whole === null) ? 0 : whole * decimal;

    }



    return 0;

  }



  function toCSSPixels(number) {

    if (Object.isString(number) && number.endsWith('px')) {

      return number;

    }

    return number + 'px';

  }



  function isDisplayed(element) {

    var originalElement = element;

    while (element && element.parentNode) {

      var display = element.getStyle('display');

      if (display === 'none') {

        return false;

      }

      element = $(element.parentNode);

    }

    return true;

  }



  var hasLayout = Prototype.K;

  if ('currentStyle' in document.documentElement) {

    hasLayout = function(element) {

      if (!element.currentStyle.hasLayout) {

        element.style.zoom = 1;

      }

      return element;

    };

  }



  function cssNameFor(key) {

    if (key.include('border')) key = key + '-width';

    return key.camelize();

  }



  Element.Layout = Class.create(Hash, {

    initialize: function($super, element, preCompute) {

      $super();

      this.element = $(element);



      Element.Layout.PROPERTIES.each( function(property) {

        this._set(property, null);

      }, this);



      if (preCompute) {

        this._preComputing = true;

        this._begin();

        Element.Layout.PROPERTIES.each( this._compute, this );

        this._end();

        this._preComputing = false;

      }

    },



    _set: function(property, value) {

      return Hash.prototype.set.call(this, property, value);

    },



    set: function(property, value) {

      throw "Properties of Element.Layout are read-only.";

    },



    get: function($super, property) {

      var value = $super(property);

      return value === null ? this._compute(property) : value;

    },



    _begin: function() {

      if (this._prepared) return;



      var element = this.element;

      if (isDisplayed(element)) {

        this._prepared = true;

        return;

      }



      var originalStyles = {

        position:   element.style.position   || '',

        width:      element.style.width      || '',

        visibility: element.style.visibility || '',

        display:    element.style.display    || ''

      };



      element.store('prototype_original_styles', originalStyles);



      var position = element.getStyle('position'),

       width = element.getStyle('width');



      if (width === "0px" || width === null) {

        element.style.display = 'block';

        width = element.getStyle('width');

      }



      var context = (position === 'fixed') ? document.viewport :

       element.parentNode;



      element.setStyle({

        position:   'absolute',

        visibility: 'hidden',

        display:    'block'

      });



      var positionedWidth = element.getStyle('width');



      var newWidth;

      if (width && (positionedWidth === width)) {

        newWidth = getPixelValue(element, 'width', context);

      } else if (position === 'absolute' || position === 'fixed') {

        newWidth = getPixelValue(element, 'width', context);

      } else {

        var parent = element.parentNode, pLayout = $(parent).getLayout();



        newWidth = pLayout.get('width') -

         this.get('margin-left') -

         this.get('border-left') -

         this.get('padding-left') -

         this.get('padding-right') -

         this.get('border-right') -

         this.get('margin-right');

      }



      element.setStyle({ width: newWidth + 'px' });



      this._prepared = true;

    },



    _end: function() {

      var element = this.element;

      var originalStyles = element.retrieve('prototype_original_styles');

      element.store('prototype_original_styles', null);

      element.setStyle(originalStyles);

      this._prepared = false;

    },



    _compute: function(property) {

      var COMPUTATIONS = Element.Layout.COMPUTATIONS;

      if (!(property in COMPUTATIONS)) {

        throw "Property not found.";

      }



      return this._set(property, COMPUTATIONS[property].call(this, this.element));

    },



    toObject: function() {

      var args = $A(arguments);

      var keys = (args.length === 0) ? Element.Layout.PROPERTIES :

       args.join(' ').split(' ');

      var obj = {};

      keys.each( function(key) {

        if (!Element.Layout.PROPERTIES.include(key)) return;

        var value = this.get(key);

        if (value != null) obj[key] = value;

      }, this);

      return obj;

    },



    toHash: function() {

      var obj = this.toObject.apply(this, arguments);

      return new Hash(obj);

    },



    toCSS: function() {

      var args = $A(arguments);

      var keys = (args.length === 0) ? Element.Layout.PROPERTIES :

       args.join(' ').split(' ');

      var css = {};



      keys.each( function(key) {

        if (!Element.Layout.PROPERTIES.include(key)) return;

        if (Element.Layout.COMPOSITE_PROPERTIES.include(key)) return;



        var value = this.get(key);

        if (value != null) css[cssNameFor(key)] = value + 'px';

      }, this);

      return css;

    },



    inspect: function() {

      return "#<Element.Layout>";

    }

  });



  Object.extend(Element.Layout, {

    PROPERTIES: $w('height width top left right bottom border-left border-right border-top border-bottom padding-left padding-right padding-top padding-bottom margin-top margin-bottom margin-left margin-right padding-box-width padding-box-height border-box-width border-box-height margin-box-width margin-box-height'),



    COMPOSITE_PROPERTIES: $w('padding-box-width padding-box-height margin-box-width margin-box-height border-box-width border-box-height'),



    COMPUTATIONS: {

      'height': function(element) {

        if (!this._preComputing) this._begin();



        var bHeight = this.get('border-box-height');

        if (bHeight <= 0) {

          if (!this._preComputing) this._end();

          return 0;

        }



        var bTop = this.get('border-top'),

         bBottom = this.get('border-bottom');



        var pTop = this.get('padding-top'),

         pBottom = this.get('padding-bottom');



        if (!this._preComputing) this._end();



        return bHeight - bTop - bBottom - pTop - pBottom;

      },



      'width': function(element) {

        if (!this._preComputing) this._begin();



        var bWidth = this.get('border-box-width');

        if (bWidth <= 0) {

          if (!this._preComputing) this._end();

          return 0;

        }



        var bLeft = this.get('border-left'),

         bRight = this.get('border-right');



        var pLeft = this.get('padding-left'),

         pRight = this.get('padding-right');



        if (!this._preComputing) this._end();



        return bWidth - bLeft - bRight - pLeft - pRight;

      },



      'padding-box-height': function(element) {

        var height = this.get('height'),

         pTop = this.get('padding-top'),

         pBottom = this.get('padding-bottom');



        return height + pTop + pBottom;

      },



      'padding-box-width': function(element) {

        var width = this.get('width'),

         pLeft = this.get('padding-left'),

         pRight = this.get('padding-right');



        return width + pLeft + pRight;

      },



      'border-box-height': function(element) {

        if (!this._preComputing) this._begin();

        var height = element.offsetHeight;

        if (!this._preComputing) this._end();

        return height;

      },



      'border-box-width': function(element) {

        if (!this._preComputing) this._begin();

        var width = element.offsetWidth;

        if (!this._preComputing) this._end();

        return width;

      },



      'margin-box-height': function(element) {

        var bHeight = this.get('border-box-height'),

         mTop = this.get('margin-top'),

         mBottom = this.get('margin-bottom');



        if (bHeight <= 0) return 0;



        return bHeight + mTop + mBottom;

      },



      'margin-box-width': function(element) {

        var bWidth = this.get('border-box-width'),

         mLeft = this.get('margin-left'),

         mRight = this.get('margin-right');



        if (bWidth <= 0) return 0;



        return bWidth + mLeft + mRight;

      },



      'top': function(element) {

        var offset = element.positionedOffset();

        return offset.top;

      },



      'bottom': function(element) {

        var offset = element.positionedOffset(),

         parent = element.getOffsetParent(),

         pHeight = parent.measure('height');



        var mHeight = this.get('border-box-height');



        return pHeight - mHeight - offset.top;

      },



      'left': function(element) {

        var offset = element.positionedOffset();

        return offset.left;

      },



      'right': function(element) {

        var offset = element.positionedOffset(),

         parent = element.getOffsetParent(),

         pWidth = parent.measure('width');



        var mWidth = this.get('border-box-width');



        return pWidth - mWidth - offset.left;

      },



      'padding-top': function(element) {

        return getPixelValue(element, 'paddingTop');

      },



      'padding-bottom': function(element) {

        return getPixelValue(element, 'paddingBottom');

      },



      'padding-left': function(element) {

        return getPixelValue(element, 'paddingLeft');

      },



      'padding-right': function(element) {

        return getPixelValue(element, 'paddingRight');

      },



      'border-top': function(element) {

        return getPixelValue(element, 'borderTopWidth');

      },



      'border-bottom': function(element) {

        return getPixelValue(element, 'borderBottomWidth');

      },



      'border-left': function(element) {

        return getPixelValue(element, 'borderLeftWidth');

      },



      'border-right': function(element) {

        return getPixelValue(element, 'borderRightWidth');

      },



      'margin-top': function(element) {

        return getPixelValue(element, 'marginTop');

      },



      'margin-bottom': function(element) {

        return getPixelValue(element, 'marginBottom');

      },



      'margin-left': function(element) {

        return getPixelValue(element, 'marginLeft');

      },



      'margin-right': function(element) {

        return getPixelValue(element, 'marginRight');

      }

    }

  });



  if ('getBoundingClientRect' in document.documentElement) {

    Object.extend(Element.Layout.COMPUTATIONS, {

      'right': function(element) {

        var parent = hasLayout(element.getOffsetParent());

        var rect = element.getBoundingClientRect(),

         pRect = parent.getBoundingClientRect();



        return (pRect.right - rect.right).round();

      },



      'bottom': function(element) {

        var parent = hasLayout(element.getOffsetParent());

        var rect = element.getBoundingClientRect(),

         pRect = parent.getBoundingClientRect();



        return (pRect.bottom - rect.bottom).round();

      }

    });

  }



  Element.Offset = Class.create({

    initialize: function(left, top) {

      this.left = left.round();

      this.top  = top.round();



      this[0] = this.left;

      this[1] = this.top;

    },



    relativeTo: function(offset) {

      return new Element.Offset(

        this.left - offset.left,

        this.top  - offset.top

      );

    },



    inspect: function() {

      return "#<Element.Offset left: #{left} top: #{top}>".interpolate(this);

    },



    toString: function() {

      return "[#{left}, #{top}]".interpolate(this);

    },



    toArray: function() {

      return [this.left, this.top];

    }

  });



  function getLayout(element, preCompute) {

    return new Element.Layout(element, preCompute);

  }



  function measure(element, property) {

    return $(element).getLayout().get(property);

  }



  function getDimensions(element) {

    element = $(element);

    var display = Element.getStyle(element, 'display');



    if (display && display !== 'none') {

      return { width: element.offsetWidth, height: element.offsetHeight };

    }



    var style = element.style;

    var originalStyles = {

      visibility: style.visibility,

      position:   style.position,

      display:    style.display

    };



    var newStyles = {

      visibility: 'hidden',

      display:    'block'

    };



    if (originalStyles.position !== 'fixed')

      newStyles.position = 'absolute';



    Element.setStyle(element, newStyles);



    var dimensions = {

      width:  element.offsetWidth,

      height: element.offsetHeight

    };



    Element.setStyle(element, originalStyles);



    return dimensions;

  }



  function getOffsetParent(element) {

    element = $(element);



    if (isDocument(element) || isDetached(element) || isBody(element) || isHtml(element))

      return $(document.body);



    var isInline = (Element.getStyle(element, 'display') === 'inline');

    if (!isInline && element.offsetParent) return $(element.offsetParent);



    while ((element = element.parentNode) && element !== document.body) {

      if (Element.getStyle(element, 'position') !== 'static') {

        return isHtml(element) ? $(document.body) : $(element);

      }

    }



    return $(document.body);

  }





  function cumulativeOffset(element) {

    element = $(element);

    var valueT = 0, valueL = 0;

    if (element.parentNode) {

      do {

        valueT += element.offsetTop  || 0;

        valueL += element.offsetLeft || 0;

        element = element.offsetParent;

      } while (element);

    }

    return new Element.Offset(valueL, valueT);

  }



  function positionedOffset(element) {

    element = $(element);



    var layout = element.getLayout();



    var valueT = 0, valueL = 0;

    do {

      valueT += element.offsetTop  || 0;

      valueL += element.offsetLeft || 0;

      element = element.offsetParent;

      if (element) {

        if (isBody(element)) break;

        var p = Element.getStyle(element, 'position');

        if (p !== 'static') break;

      }

    } while (element);



    valueL -= layout.get('margin-top');

    valueT -= layout.get('margin-left');



    return new Element.Offset(valueL, valueT);

  }



  function cumulativeScrollOffset(element) {

    var valueT = 0, valueL = 0;

    do {

      valueT += element.scrollTop  || 0;

      valueL += element.scrollLeft || 0;

      element = element.parentNode;

    } while (element);

    return new Element.Offset(valueL, valueT);

  }



  function viewportOffset(forElement) {

    element = $(element);

    var valueT = 0, valueL = 0, docBody = document.body;



    var element = forElement;

    do {

      valueT += element.offsetTop  || 0;

      valueL += element.offsetLeft || 0;

      if (element.offsetParent == docBody &&

        Element.getStyle(element, 'position') == 'absolute') break;

    } while (element = element.offsetParent);



    element = forElement;

    do {

      if (element != docBody) {

        valueT -= element.scrollTop  || 0;

        valueL -= element.scrollLeft || 0;

      }

    } while (element = element.parentNode);

    return new Element.Offset(valueL, valueT);

  }



  function absolutize(element) {

    element = $(element);



    if (Element.getStyle(element, 'position') === 'absolute') {

      return element;

    }



    var offsetParent = getOffsetParent(element);

    var eOffset = element.viewportOffset(),

     pOffset = offsetParent.viewportOffset();



    var offset = eOffset.relativeTo(pOffset);

    var layout = element.getLayout();



    element.store('prototype_absolutize_original_styles', {

      left:   element.getStyle('left'),

      top:    element.getStyle('top'),

      width:  element.getStyle('width'),

      height: element.getStyle('height')

    });



    element.setStyle({

      position: 'absolute',

      top:    offset.top + 'px',

      left:   offset.left + 'px',

      width:  layout.get('width') + 'px',

      height: layout.get('height') + 'px'

    });



    return element;

  }



  function relativize(element) {

    element = $(element);

    if (Element.getStyle(element, 'position') === 'relative') {

      return element;

    }



    var originalStyles =

     element.retrieve('prototype_absolutize_original_styles');



    if (originalStyles) element.setStyle(originalStyles);

    return element;

  }



  if (Prototype.Browser.IE) {

    getOffsetParent = getOffsetParent.wrap(

      function(proceed, element) {

        element = $(element);



        if (isDocument(element) || isDetached(element) || isBody(element) || isHtml(element))

          return $(document.body);



        var position = element.getStyle('position');

        if (position !== 'static') return proceed(element);



        element.setStyle({ position: 'relative' });

        var value = proceed(element);

        element.setStyle({ position: position });

        return value;

      }

    );



    positionedOffset = positionedOffset.wrap(function(proceed, element) {

      element = $(element);

      if (!element.parentNode) return new Element.Offset(0, 0);

      var position = element.getStyle('position');

      if (position !== 'static') return proceed(element);



      var offsetParent = element.getOffsetParent();

      if (offsetParent && offsetParent.getStyle('position') === 'fixed')

        hasLayout(offsetParent);



      element.setStyle({ position: 'relative' });

      var value = proceed(element);

      element.setStyle({ position: position });

      return value;

    });

  } else if (Prototype.Browser.Webkit) {

    cumulativeOffset = function(element) {

      element = $(element);

      var valueT = 0, valueL = 0;

      do {

        valueT += element.offsetTop  || 0;

        valueL += element.offsetLeft || 0;

        if (element.offsetParent == document.body)

          if (Element.getStyle(element, 'position') == 'absolute') break;



        element = element.offsetParent;

      } while (element);



      return new Element.Offset(valueL, valueT);

    };

  }





  Element.addMethods({

    getLayout:              getLayout,

    measure:                measure,

    getDimensions:          getDimensions,

    getOffsetParent:        getOffsetParent,

    cumulativeOffset:       cumulativeOffset,

    positionedOffset:       positionedOffset,

    cumulativeScrollOffset: cumulativeScrollOffset,

    viewportOffset:         viewportOffset,

    absolutize:             absolutize,

    relativize:             relativize

  });



  function isBody(element) {

    return element.nodeName.toUpperCase() === 'BODY';

  }



  function isHtml(element) {

    return element.nodeName.toUpperCase() === 'HTML';

  }



  function isDocument(element) {

    return element.nodeType === Node.DOCUMENT_NODE;

  }



  function isDetached(element) {

    return element !== document.body &&

     !Element.descendantOf(element, document.body);

  }



  if ('getBoundingClientRect' in document.documentElement) {

    Element.addMethods({

      viewportOffset: function(element) {

        element = $(element);

        if (isDetached(element)) return new Element.Offset(0, 0);



        var rect = element.getBoundingClientRect(),

         docEl = document.documentElement;

        return new Element.Offset(rect.left - docEl.clientLeft,

         rect.top - docEl.clientTop);

      }

    });

  }

})();

window.$$ = function() {

  var expression = $A(arguments).join(', ');

  return Prototype.Selector.select(expression, document);

};



Prototype.Selector = (function() {



  function select() {

    throw new Error('Method "Prototype.Selector.select" must be defined.');

  }



  function match() {

    throw new Error('Method "Prototype.Selector.match" must be defined.');

  }



  function find(elements, expression, index) {

    index = index || 0;

    var match = Prototype.Selector.match, length = elements.length, matchIndex = 0, i;



    for (i = 0; i < length; i++) {

      if (match(elements[i], expression) && index == matchIndex++) {

        return Element.extend(elements[i]);

      }

    }

  }



  function extendElements(elements) {

    for (var i = 0, length = elements.length; i < length; i++) {

      Element.extend(elements[i]);

    }

    return elements;

  }





  var K = Prototype.K;



  return {

    select: select,

    match: match,

    find: find,

    extendElements: (Element.extend === K) ? K : extendElements,

    extendElement: Element.extend

  };

})();

/*!

 * Sizzle CSS Selector Engine - v1.0

 *  Copyright 2009, The Dojo Foundation

 *  Released under the MIT, BSD, and GPL Licenses.

 *  More information: http://sizzlejs.com/

 */

(function(){



var chunker = /((?:\((?:\([^()]+\)|[^()]+)+\)|\[(?:\[[^[\]]*\]|['"][^'"]*['"]|[^[\]'"]+)+\]|\\.|[^ >+~,(\[\\]+)+|[>+~])(\s*,\s*)?((?:.|\r|\n)*)/g,

	done = 0,

	toString = Object.prototype.toString,

	hasDuplicate = false,

	baseHasDuplicate = true;



[0, 0].sort(function(){

	baseHasDuplicate = false;

	return 0;

});



var Sizzle = function(selector, context, results, seed) {

	results = results || [];

	var origContext = context = context || document;



	if ( context.nodeType !== 1 && context.nodeType !== 9 ) {

		return [];

	}



	if ( !selector || typeof selector !== "string" ) {

		return results;

	}



	var parts = [], m, set, checkSet, check, mode, extra, prune = true, contextXML = isXML(context),

		soFar = selector;



	while ( (chunker.exec(""), m = chunker.exec(soFar)) !== null ) {

		soFar = m[3];



		parts.push( m[1] );



		if ( m[2] ) {

			extra = m[3];

			break;

		}

	}



	if ( parts.length > 1 && origPOS.exec( selector ) ) {

		if ( parts.length === 2 && Expr.relative[ parts[0] ] ) {

			set = posProcess( parts[0] + parts[1], context );

		} else {

			set = Expr.relative[ parts[0] ] ?

				[ context ] :

				Sizzle( parts.shift(), context );



			while ( parts.length ) {

				selector = parts.shift();



				if ( Expr.relative[ selector ] )

					selector += parts.shift();



				set = posProcess( selector, set );

			}

		}

	} else {

		if ( !seed && parts.length > 1 && context.nodeType === 9 && !contextXML &&

				Expr.match.ID.test(parts[0]) && !Expr.match.ID.test(parts[parts.length - 1]) ) {

			var ret = Sizzle.find( parts.shift(), context, contextXML );

			context = ret.expr ? Sizzle.filter( ret.expr, ret.set )[0] : ret.set[0];

		}



		if ( context ) {

			var ret = seed ?

				{ expr: parts.pop(), set: makeArray(seed) } :

				Sizzle.find( parts.pop(), parts.length === 1 && (parts[0] === "~" || parts[0] === "+") && context.parentNode ? context.parentNode : context, contextXML );

			set = ret.expr ? Sizzle.filter( ret.expr, ret.set ) : ret.set;



			if ( parts.length > 0 ) {

				checkSet = makeArray(set);

			} else {

				prune = false;

			}



			while ( parts.length ) {

				var cur = parts.pop(), pop = cur;



				if ( !Expr.relative[ cur ] ) {

					cur = "";

				} else {

					pop = parts.pop();

				}



				if ( pop == null ) {

					pop = context;

				}



				Expr.relative[ cur ]( checkSet, pop, contextXML );

			}

		} else {

			checkSet = parts = [];

		}

	}



	if ( !checkSet ) {

		checkSet = set;

	}



	if ( !checkSet ) {

		throw "Syntax error, unrecognized expression: " + (cur || selector);

	}



	if ( toString.call(checkSet) === "[object Array]" ) {

		if ( !prune ) {

			results.push.apply( results, checkSet );

		} else if ( context && context.nodeType === 1 ) {

			for ( var i = 0; checkSet[i] != null; i++ ) {

				if ( checkSet[i] && (checkSet[i] === true || checkSet[i].nodeType === 1 && contains(context, checkSet[i])) ) {

					results.push( set[i] );

				}

			}

		} else {

			for ( var i = 0; checkSet[i] != null; i++ ) {

				if ( checkSet[i] && checkSet[i].nodeType === 1 ) {

					results.push( set[i] );

				}

			}

		}

	} else {

		makeArray( checkSet, results );

	}



	if ( extra ) {

		Sizzle( extra, origContext, results, seed );

		Sizzle.uniqueSort( results );

	}



	return results;

};



Sizzle.uniqueSort = function(results){

	if ( sortOrder ) {

		hasDuplicate = baseHasDuplicate;

		results.sort(sortOrder);



		if ( hasDuplicate ) {

			for ( var i = 1; i < results.length; i++ ) {

				if ( results[i] === results[i-1] ) {

					results.splice(i--, 1);

				}

			}

		}

	}



	return results;

};



Sizzle.matches = function(expr, set){

	return Sizzle(expr, null, null, set);

};



Sizzle.find = function(expr, context, isXML){

	var set, match;



	if ( !expr ) {

		return [];

	}



	for ( var i = 0, l = Expr.order.length; i < l; i++ ) {

		var type = Expr.order[i], match;



		if ( (match = Expr.leftMatch[ type ].exec( expr )) ) {

			var left = match[1];

			match.splice(1,1);



			if ( left.substr( left.length - 1 ) !== "\\" ) {

				match[1] = (match[1] || "").replace(/\\/g, "");

				set = Expr.find[ type ]( match, context, isXML );

				if ( set != null ) {

					expr = expr.replace( Expr.match[ type ], "" );

					break;

				}

			}

		}

	}



	if ( !set ) {

		set = context.getElementsByTagName("*");

	}



	return {set: set, expr: expr};

};



Sizzle.filter = function(expr, set, inplace, not){

	var old = expr, result = [], curLoop = set, match, anyFound,

		isXMLFilter = set && set[0] && isXML(set[0]);



	while ( expr && set.length ) {

		for ( var type in Expr.filter ) {

			if ( (match = Expr.match[ type ].exec( expr )) != null ) {

				var filter = Expr.filter[ type ], found, item;

				anyFound = false;



				if ( curLoop == result ) {

					result = [];

				}



				if ( Expr.preFilter[ type ] ) {

					match = Expr.preFilter[ type ]( match, curLoop, inplace, result, not, isXMLFilter );



					if ( !match ) {

						anyFound = found = true;

					} else if ( match === true ) {

						continue;

					}

				}



				if ( match ) {

					for ( var i = 0; (item = curLoop[i]) != null; i++ ) {

						if ( item ) {

							found = filter( item, match, i, curLoop );

							var pass = not ^ !!found;



							if ( inplace && found != null ) {

								if ( pass ) {

									anyFound = true;

								} else {

									curLoop[i] = false;

								}

							} else if ( pass ) {

								result.push( item );

								anyFound = true;

							}

						}

					}

				}



				if ( found !== undefined ) {

					if ( !inplace ) {

						curLoop = result;

					}



					expr = expr.replace( Expr.match[ type ], "" );



					if ( !anyFound ) {

						return [];

					}



					break;

				}

			}

		}



		if ( expr == old ) {

			if ( anyFound == null ) {

				throw "Syntax error, unrecognized expression: " + expr;

			} else {

				break;

			}

		}



		old = expr;

	}



	return curLoop;

};



var Expr = Sizzle.selectors = {

	order: [ "ID", "NAME", "TAG" ],

	match: {

		ID: /#((?:[\w\u00c0-\uFFFF-]|\\.)+)/,

		CLASS: /\.((?:[\w\u00c0-\uFFFF-]|\\.)+)/,

		NAME: /\[name=['"]*((?:[\w\u00c0-\uFFFF-]|\\.)+)['"]*\]/,

		ATTR: /\[\s*((?:[\w\u00c0-\uFFFF-]|\\.)+)\s*(?:(\S?=)\s*(['"]*)(.*?)\3|)\s*\]/,

		TAG: /^((?:[\w\u00c0-\uFFFF\*-]|\\.)+)/,

		CHILD: /:(only|nth|last|first)-child(?:\((even|odd|[\dn+-]*)\))?/,

		POS: /:(nth|eq|gt|lt|first|last|even|odd)(?:\((\d*)\))?(?=[^-]|$)/,

		PSEUDO: /:((?:[\w\u00c0-\uFFFF-]|\\.)+)(?:\((['"]*)((?:\([^\)]+\)|[^\2\(\)]*)+)\2\))?/

	},

	leftMatch: {},

	attrMap: {

		"class": "className",

		"for": "htmlFor"

	},

	attrHandle: {

		href: function(elem){

			return elem.getAttribute("href");

		}

	},

	relative: {

		"+": function(checkSet, part, isXML){

			var isPartStr = typeof part === "string",

				isTag = isPartStr && !/\W/.test(part),

				isPartStrNotTag = isPartStr && !isTag;



			if ( isTag && !isXML ) {

				part = part.toUpperCase();

			}



			for ( var i = 0, l = checkSet.length, elem; i < l; i++ ) {

				if ( (elem = checkSet[i]) ) {

					while ( (elem = elem.previousSibling) && elem.nodeType !== 1 ) {}



					checkSet[i] = isPartStrNotTag || elem && elem.nodeName === part ?

						elem || false :

						elem === part;

				}

			}



			if ( isPartStrNotTag ) {

				Sizzle.filter( part, checkSet, true );

			}

		},

		">": function(checkSet, part, isXML){

			var isPartStr = typeof part === "string";



			if ( isPartStr && !/\W/.test(part) ) {

				part = isXML ? part : part.toUpperCase();



				for ( var i = 0, l = checkSet.length; i < l; i++ ) {

					var elem = checkSet[i];

					if ( elem ) {

						var parent = elem.parentNode;

						checkSet[i] = parent.nodeName === part ? parent : false;

					}

				}

			} else {

				for ( var i = 0, l = checkSet.length; i < l; i++ ) {

					var elem = checkSet[i];

					if ( elem ) {

						checkSet[i] = isPartStr ?

							elem.parentNode :

							elem.parentNode === part;

					}

				}



				if ( isPartStr ) {

					Sizzle.filter( part, checkSet, true );

				}

			}

		},

		"": function(checkSet, part, isXML){

			var doneName = done++, checkFn = dirCheck;



			if ( !/\W/.test(part) ) {

				var nodeCheck = part = isXML ? part : part.toUpperCase();

				checkFn = dirNodeCheck;

			}



			checkFn("parentNode", part, doneName, checkSet, nodeCheck, isXML);

		},

		"~": function(checkSet, part, isXML){

			var doneName = done++, checkFn = dirCheck;



			if ( typeof part === "string" && !/\W/.test(part) ) {

				var nodeCheck = part = isXML ? part : part.toUpperCase();

				checkFn = dirNodeCheck;

			}



			checkFn("previousSibling", part, doneName, checkSet, nodeCheck, isXML);

		}

	},

	find: {

		ID: function(match, context, isXML){

			if ( typeof context.getElementById !== "undefined" && !isXML ) {

				var m = context.getElementById(match[1]);

				return m ? [m] : [];

			}

		},

		NAME: function(match, context, isXML){

			if ( typeof context.getElementsByName !== "undefined" ) {

				var ret = [], results = context.getElementsByName(match[1]);



				for ( var i = 0, l = results.length; i < l; i++ ) {

					if ( results[i].getAttribute("name") === match[1] ) {

						ret.push( results[i] );

					}

				}



				return ret.length === 0 ? null : ret;

			}

		},

		TAG: function(match, context){

			return context.getElementsByTagName(match[1]);

		}

	},

	preFilter: {

		CLASS: function(match, curLoop, inplace, result, not, isXML){

			match = " " + match[1].replace(/\\/g, "") + " ";



			if ( isXML ) {

				return match;

			}



			for ( var i = 0, elem; (elem = curLoop[i]) != null; i++ ) {

				if ( elem ) {

					if ( not ^ (elem.className && (" " + elem.className + " ").indexOf(match) >= 0) ) {

						if ( !inplace )

							result.push( elem );

					} else if ( inplace ) {

						curLoop[i] = false;

					}

				}

			}



			return false;

		},

		ID: function(match){

			return match[1].replace(/\\/g, "");

		},

		TAG: function(match, curLoop){

			for ( var i = 0; curLoop[i] === false; i++ ){}

			return curLoop[i] && isXML(curLoop[i]) ? match[1] : match[1].toUpperCase();

		},

		CHILD: function(match){

			if ( match[1] == "nth" ) {

				var test = /(-?)(\d*)n((?:\+|-)?\d*)/.exec(

					match[2] == "even" && "2n" || match[2] == "odd" && "2n+1" ||

					!/\D/.test( match[2] ) && "0n+" + match[2] || match[2]);



				match[2] = (test[1] + (test[2] || 1)) - 0;

				match[3] = test[3] - 0;

			}



			match[0] = done++;



			return match;

		},

		ATTR: function(match, curLoop, inplace, result, not, isXML){

			var name = match[1].replace(/\\/g, "");



			if ( !isXML && Expr.attrMap[name] ) {

				match[1] = Expr.attrMap[name];

			}



			if ( match[2] === "~=" ) {

				match[4] = " " + match[4] + " ";

			}



			return match;

		},

		PSEUDO: function(match, curLoop, inplace, result, not){

			if ( match[1] === "not" ) {

				if ( ( chunker.exec(match[3]) || "" ).length > 1 || /^\w/.test(match[3]) ) {

					match[3] = Sizzle(match[3], null, null, curLoop);

				} else {

					var ret = Sizzle.filter(match[3], curLoop, inplace, true ^ not);

					if ( !inplace ) {

						result.push.apply( result, ret );

					}

					return false;

				}

			} else if ( Expr.match.POS.test( match[0] ) || Expr.match.CHILD.test( match[0] ) ) {

				return true;

			}



			return match;

		},

		POS: function(match){

			match.unshift( true );

			return match;

		}

	},

	filters: {

		enabled: function(elem){

			return elem.disabled === false && elem.type !== "hidden";

		},

		disabled: function(elem){

			return elem.disabled === true;

		},

		checked: function(elem){

			return elem.checked === true;

		},

		selected: function(elem){

			elem.parentNode.selectedIndex;

			return elem.selected === true;

		},

		parent: function(elem){

			return !!elem.firstChild;

		},

		empty: function(elem){

			return !elem.firstChild;

		},

		has: function(elem, i, match){

			return !!Sizzle( match[3], elem ).length;

		},

		header: function(elem){

			return /h\d/i.test( elem.nodeName );

		},

		text: function(elem){

			return "text" === elem.type;

		},

		radio: function(elem){

			return "radio" === elem.type;

		},

		checkbox: function(elem){

			return "checkbox" === elem.type;

		},

		file: function(elem){

			return "file" === elem.type;

		},

		password: function(elem){

			return "password" === elem.type;

		},

		submit: function(elem){

			return "submit" === elem.type;

		},

		image: function(elem){

			return "image" === elem.type;

		},

		reset: function(elem){

			return "reset" === elem.type;

		},

		button: function(elem){

			return "button" === elem.type || elem.nodeName.toUpperCase() === "BUTTON";

		},

		input: function(elem){

			return /input|select|textarea|button/i.test(elem.nodeName);

		}

	},

	setFilters: {

		first: function(elem, i){

			return i === 0;

		},

		last: function(elem, i, match, array){

			return i === array.length - 1;

		},

		even: function(elem, i){

			return i % 2 === 0;

		},

		odd: function(elem, i){

			return i % 2 === 1;

		},

		lt: function(elem, i, match){

			return i < match[3] - 0;

		},

		gt: function(elem, i, match){

			return i > match[3] - 0;

		},

		nth: function(elem, i, match){

			return match[3] - 0 == i;

		},

		eq: function(elem, i, match){

			return match[3] - 0 == i;

		}

	},

	filter: {

		PSEUDO: function(elem, match, i, array){

			var name = match[1], filter = Expr.filters[ name ];



			if ( filter ) {

				return filter( elem, i, match, array );

			} else if ( name === "contains" ) {

				return (elem.textContent || elem.innerText || "").indexOf(match[3]) >= 0;

			} else if ( name === "not" ) {

				var not = match[3];



				for ( var i = 0, l = not.length; i < l; i++ ) {

					if ( not[i] === elem ) {

						return false;

					}

				}



				return true;

			}

		},

		CHILD: function(elem, match){

			var type = match[1], node = elem;

			switch (type) {

				case 'only':

				case 'first':

					while ( (node = node.previousSibling) )  {

						if ( node.nodeType === 1 ) return false;

					}

					if ( type == 'first') return true;

					node = elem;

				case 'last':

					while ( (node = node.nextSibling) )  {

						if ( node.nodeType === 1 ) return false;

					}

					return true;

				case 'nth':

					var first = match[2], last = match[3];



					if ( first == 1 && last == 0 ) {

						return true;

					}



					var doneName = match[0],

						parent = elem.parentNode;



					if ( parent && (parent.sizcache !== doneName || !elem.nodeIndex) ) {

						var count = 0;

						for ( node = parent.firstChild; node; node = node.nextSibling ) {

							if ( node.nodeType === 1 ) {

								node.nodeIndex = ++count;

							}

						}

						parent.sizcache = doneName;

					}



					var diff = elem.nodeIndex - last;

					if ( first == 0 ) {

						return diff == 0;

					} else {

						return ( diff % first == 0 && diff / first >= 0 );

					}

			}

		},

		ID: function(elem, match){

			return elem.nodeType === 1 && elem.getAttribute("id") === match;

		},

		TAG: function(elem, match){

			return (match === "*" && elem.nodeType === 1) || elem.nodeName === match;

		},

		CLASS: function(elem, match){

			return (" " + (elem.className || elem.getAttribute("class")) + " ")

				.indexOf( match ) > -1;

		},

		ATTR: function(elem, match){

			var name = match[1],

				result = Expr.attrHandle[ name ] ?

					Expr.attrHandle[ name ]( elem ) :

					elem[ name ] != null ?

						elem[ name ] :

						elem.getAttribute( name ),

				value = result + "",

				type = match[2],

				check = match[4];



			return result == null ?

				type === "!=" :

				type === "=" ?

				value === check :

				type === "*=" ?

				value.indexOf(check) >= 0 :

				type === "~=" ?

				(" " + value + " ").indexOf(check) >= 0 :

				!check ?

				value && result !== false :

				type === "!=" ?

				value != check :

				type === "^=" ?

				value.indexOf(check) === 0 :

				type === "$=" ?

				value.substr(value.length - check.length) === check :

				type === "|=" ?

				value === check || value.substr(0, check.length + 1) === check + "-" :

				false;

		},

		POS: function(elem, match, i, array){

			var name = match[2], filter = Expr.setFilters[ name ];



			if ( filter ) {

				return filter( elem, i, match, array );

			}

		}

	}

};



var origPOS = Expr.match.POS;



for ( var type in Expr.match ) {

	Expr.match[ type ] = new RegExp( Expr.match[ type ].source + /(?![^\[]*\])(?![^\(]*\))/.source );

	Expr.leftMatch[ type ] = new RegExp( /(^(?:.|\r|\n)*?)/.source + Expr.match[ type ].source );

}



var makeArray = function(array, results) {

	array = Array.prototype.slice.call( array, 0 );



	if ( results ) {

		results.push.apply( results, array );

		return results;

	}



	return array;

};



try {

	Array.prototype.slice.call( document.documentElement.childNodes, 0 );



} catch(e){

	makeArray = function(array, results) {

		var ret = results || [];



		if ( toString.call(array) === "[object Array]" ) {

			Array.prototype.push.apply( ret, array );

		} else {

			if ( typeof array.length === "number" ) {

				for ( var i = 0, l = array.length; i < l; i++ ) {

					ret.push( array[i] );

				}

			} else {

				for ( var i = 0; array[i]; i++ ) {

					ret.push( array[i] );

				}

			}

		}



		return ret;

	};

}



var sortOrder;



if ( document.documentElement.compareDocumentPosition ) {

	sortOrder = function( a, b ) {

		if ( !a.compareDocumentPosition || !b.compareDocumentPosition ) {

			if ( a == b ) {

				hasDuplicate = true;

			}

			return 0;

		}



		var ret = a.compareDocumentPosition(b) & 4 ? -1 : a === b ? 0 : 1;

		if ( ret === 0 ) {

			hasDuplicate = true;

		}

		return ret;

	};

} else if ( "sourceIndex" in document.documentElement ) {

	sortOrder = function( a, b ) {

		if ( !a.sourceIndex || !b.sourceIndex ) {

			if ( a == b ) {

				hasDuplicate = true;

			}

			return 0;

		}



		var ret = a.sourceIndex - b.sourceIndex;

		if ( ret === 0 ) {

			hasDuplicate = true;

		}

		return ret;

	};

} else if ( document.createRange ) {

	sortOrder = function( a, b ) {

		if ( !a.ownerDocument || !b.ownerDocument ) {

			if ( a == b ) {

				hasDuplicate = true;

			}

			return 0;

		}



		var aRange = a.ownerDocument.createRange(), bRange = b.ownerDocument.createRange();

		aRange.setStart(a, 0);

		aRange.setEnd(a, 0);

		bRange.setStart(b, 0);

		bRange.setEnd(b, 0);

		var ret = aRange.compareBoundaryPoints(Range.START_TO_END, bRange);

		if ( ret === 0 ) {

			hasDuplicate = true;

		}

		return ret;

	};

}



(function(){

	var form = document.createElement("div"),

		id = "script" + (new Date).getTime();

	form.innerHTML = "<a name='" + id + "'/>";



	var root = document.documentElement;

	root.insertBefore( form, root.firstChild );



	if ( !!document.getElementById( id ) ) {

		Expr.find.ID = function(match, context, isXML){

			if ( typeof context.getElementById !== "undefined" && !isXML ) {

				var m = context.getElementById(match[1]);

				return m ? m.id === match[1] || typeof m.getAttributeNode !== "undefined" && m.getAttributeNode("id").nodeValue === match[1] ? [m] : undefined : [];

			}

		};



		Expr.filter.ID = function(elem, match){

			var node = typeof elem.getAttributeNode !== "undefined" && elem.getAttributeNode("id");

			return elem.nodeType === 1 && node && node.nodeValue === match;

		};

	}



	root.removeChild( form );

	root = form = null; // release memory in IE

})();



(function(){



	var div = document.createElement("div");

	div.appendChild( document.createComment("") );



	if ( div.getElementsByTagName("*").length > 0 ) {

		Expr.find.TAG = function(match, context){

			var results = context.getElementsByTagName(match[1]);



			if ( match[1] === "*" ) {

				var tmp = [];



				for ( var i = 0; results[i]; i++ ) {

					if ( results[i].nodeType === 1 ) {

						tmp.push( results[i] );

					}

				}



				results = tmp;

			}



			return results;

		};

	}



	div.innerHTML = "<a href='#'></a>";

	if ( div.firstChild && typeof div.firstChild.getAttribute !== "undefined" &&

			div.firstChild.getAttribute("href") !== "#" ) {

		Expr.attrHandle.href = function(elem){

			return elem.getAttribute("href", 2);

		};

	}



	div = null; // release memory in IE

})();



if ( document.querySelectorAll ) (function(){

	var oldSizzle = Sizzle, div = document.createElement("div");

	div.innerHTML = "<p class='TEST'></p>";



	if ( div.querySelectorAll && div.querySelectorAll(".TEST").length === 0 ) {

		return;

	}



	Sizzle = function(query, context, extra, seed){

		context = context || document;



		if ( !seed && context.nodeType === 9 && !isXML(context) ) {

			try {

				return makeArray( context.querySelectorAll(query), extra );

			} catch(e){}

		}



		return oldSizzle(query, context, extra, seed);

	};



	for ( var prop in oldSizzle ) {

		Sizzle[ prop ] = oldSizzle[ prop ];

	}



	div = null; // release memory in IE

})();



if ( document.getElementsByClassName && document.documentElement.getElementsByClassName ) (function(){

	var div = document.createElement("div");

	div.innerHTML = "<div class='test e'></div><div class='test'></div>";



	if ( div.getElementsByClassName("e").length === 0 )

		return;



	div.lastChild.className = "e";



	if ( div.getElementsByClassName("e").length === 1 )

		return;



	Expr.order.splice(1, 0, "CLASS");

	Expr.find.CLASS = function(match, context, isXML) {

		if ( typeof context.getElementsByClassName !== "undefined" && !isXML ) {

			return context.getElementsByClassName(match[1]);

		}

	};



	div = null; // release memory in IE

})();



function dirNodeCheck( dir, cur, doneName, checkSet, nodeCheck, isXML ) {

	var sibDir = dir == "previousSibling" && !isXML;

	for ( var i = 0, l = checkSet.length; i < l; i++ ) {

		var elem = checkSet[i];

		if ( elem ) {

			if ( sibDir && elem.nodeType === 1 ){

				elem.sizcache = doneName;

				elem.sizset = i;

			}

			elem = elem[dir];

			var match = false;



			while ( elem ) {

				if ( elem.sizcache === doneName ) {

					match = checkSet[elem.sizset];

					break;

				}



				if ( elem.nodeType === 1 && !isXML ){

					elem.sizcache = doneName;

					elem.sizset = i;

				}



				if ( elem.nodeName === cur ) {

					match = elem;

					break;

				}



				elem = elem[dir];

			}



			checkSet[i] = match;

		}

	}

}



function dirCheck( dir, cur, doneName, checkSet, nodeCheck, isXML ) {

	var sibDir = dir == "previousSibling" && !isXML;

	for ( var i = 0, l = checkSet.length; i < l; i++ ) {

		var elem = checkSet[i];

		if ( elem ) {

			if ( sibDir && elem.nodeType === 1 ) {

				elem.sizcache = doneName;

				elem.sizset = i;

			}

			elem = elem[dir];

			var match = false;



			while ( elem ) {

				if ( elem.sizcache === doneName ) {

					match = checkSet[elem.sizset];

					break;

				}



				if ( elem.nodeType === 1 ) {

					if ( !isXML ) {

						elem.sizcache = doneName;

						elem.sizset = i;

					}

					if ( typeof cur !== "string" ) {

						if ( elem === cur ) {

							match = true;

							break;

						}



					} else if ( Sizzle.filter( cur, [elem] ).length > 0 ) {

						match = elem;

						break;

					}

				}



				elem = elem[dir];

			}



			checkSet[i] = match;

		}

	}

}



var contains = document.compareDocumentPosition ?  function(a, b){

	return a.compareDocumentPosition(b) & 16;

} : function(a, b){

	return a !== b && (a.contains ? a.contains(b) : true);

};



var isXML = function(elem){

	return elem.nodeType === 9 && elem.documentElement.nodeName !== "HTML" ||

		!!elem.ownerDocument && elem.ownerDocument.documentElement.nodeName !== "HTML";

};



var posProcess = function(selector, context){

	var tmpSet = [], later = "", match,

		root = context.nodeType ? [context] : context;



	while ( (match = Expr.match.PSEUDO.exec( selector )) ) {

		later += match[0];

		selector = selector.replace( Expr.match.PSEUDO, "" );

	}



	selector = Expr.relative[selector] ? selector + "*" : selector;



	for ( var i = 0, l = root.length; i < l; i++ ) {

		Sizzle( selector, root[i], tmpSet );

	}



	return Sizzle.filter( later, tmpSet );

};





window.Sizzle = Sizzle;



})();



Prototype._original_property = window.Sizzle;



;(function(engine) {

  var extendElements = Prototype.Selector.extendElements;



  function select(selector, scope) {

    return extendElements(engine(selector, scope || document));

  }



  function match(element, selector) {

    return engine.matches(selector, [element]).length == 1;

  }



  Prototype.Selector.engine = engine;

  Prototype.Selector.select = select;

  Prototype.Selector.match = match;

})(Sizzle);



window.Sizzle = Prototype._original_property;

delete Prototype._original_property;



var Form = {

  reset: function(form) {

    form = $(form);

    form.reset();

    return form;

  },



  serializeElements: function(elements, options) {

    if (typeof options != 'object') options = { hash: !!options };

    else if (Object.isUndefined(options.hash)) options.hash = true;

    var key, value, submitted = false, submit = options.submit, accumulator, initial;



    if (options.hash) {

      initial = {};

      accumulator = function(result, key, value) {

        if (key in result) {

          if (!Object.isArray(result[key])) result[key] = [result[key]];

          result[key].push(value);

        } else result[key] = value;

        return result;

      };

    } else {

      initial = '';

      accumulator = function(result, key, value) {

        return result + (result ? '&' : '') + encodeURIComponent(key) + '=' + encodeURIComponent(value);

      }

    }



    return elements.inject(initial, function(result, element) {

      if (!element.disabled && element.name) {

        key = element.name; value = $(element).getValue();

        if (value != null && element.type != 'file' && (element.type != 'submit' || (!submitted &&

            submit !== false && (!submit || key == submit) && (submitted = true)))) {

          result = accumulator(result, key, value);

        }

      }

      return result;

    });

  }

};



Form.Methods = {

  serialize: function(form, options) {

    return Form.serializeElements(Form.getElements(form), options);

  },



  getElements: function(form) {

    var elements = $(form).getElementsByTagName('*'),

        element,

        arr = [ ],

        serializers = Form.Element.Serializers;

    for (var i = 0; element = elements[i]; i++) {

      arr.push(element);

    }

    return arr.inject([], function(elements, child) {

      if (serializers[child.tagName.toLowerCase()])

        elements.push(Element.extend(child));

      return elements;

    })

  },



  getInputs: function(form, typeName, name) {

    form = $(form);

    var inputs = form.getElementsByTagName('input');



    if (!typeName && !name) return $A(inputs).map(Element.extend);



    for (var i = 0, matchingInputs = [], length = inputs.length; i < length; i++) {

      var input = inputs[i];

      if ((typeName && input.type != typeName) || (name && input.name != name))

        continue;

      matchingInputs.push(Element.extend(input));

    }



    return matchingInputs;

  },



  disable: function(form) {

    form = $(form);

    Form.getElements(form).invoke('disable');

    return form;

  },



  enable: function(form) {

    form = $(form);

    Form.getElements(form).invoke('enable');

    return form;

  },



  findFirstElement: function(form) {

    var elements = $(form).getElements().findAll(function(element) {

      return 'hidden' != element.type && !element.disabled;

    });

    var firstByIndex = elements.findAll(function(element) {

      return element.hasAttribute('tabIndex') && element.tabIndex >= 0;

    }).sortBy(function(element) { return element.tabIndex }).first();



    return firstByIndex ? firstByIndex : elements.find(function(element) {

      return /^(?:input|select|textarea)$/i.test(element.tagName);

    });

  },



  focusFirstElement: function(form) {

    form = $(form);

    var element = form.findFirstElement();

    if (element) element.activate();

    return form;

  },



  request: function(form, options) {

    form = $(form), options = Object.clone(options || { });



    var params = options.parameters, action = form.readAttribute('action') || '';

    if (action.blank()) action = window.location.href;

    options.parameters = form.serialize(true);



    if (params) {

      if (Object.isString(params)) params = params.toQueryParams();

      Object.extend(options.parameters, params);

    }



    if (form.hasAttribute('method') && !options.method)

      options.method = form.method;



    return new Ajax.Request(action, options);

  }

};



/*--------------------------------------------------------------------------*/





Form.Element = {

  focus: function(element) {

    $(element).focus();

    return element;

  },



  select: function(element) {

    $(element).select();

    return element;

  }

};



Form.Element.Methods = {



  serialize: function(element) {

    element = $(element);

    if (!element.disabled && element.name) {

      var value = element.getValue();

      if (value != undefined) {

        var pair = { };

        pair[element.name] = value;

        return Object.toQueryString(pair);

      }

    }

    return '';

  },



  getValue: function(element) {

    element = $(element);

    var method = element.tagName.toLowerCase();

    return Form.Element.Serializers[method](element);

  },



  setValue: function(element, value) {

    element = $(element);

    var method = element.tagName.toLowerCase();

    Form.Element.Serializers[method](element, value);

    return element;

  },



  clear: function(element) {

    $(element).value = '';

    return element;

  },



  present: function(element) {

    return $(element).value != '';

  },



  activate: function(element) {

    element = $(element);

    try {

      element.focus();

      if (element.select && (element.tagName.toLowerCase() != 'input' ||

          !(/^(?:button|reset|submit)$/i.test(element.type))))

        element.select();

    } catch (e) { }

    return element;

  },



  disable: function(element) {

    element = $(element);

    element.disabled = true;

    return element;

  },



  enable: function(element) {

    element = $(element);

    element.disabled = false;

    return element;

  }

};



/*--------------------------------------------------------------------------*/



var Field = Form.Element;



var $F = Form.Element.Methods.getValue;



/*--------------------------------------------------------------------------*/



Form.Element.Serializers = (function() {

  function input(element, value) {

    switch (element.type.toLowerCase()) {

      case 'checkbox':

      case 'radio':

        return inputSelector(element, value);

      default:

        return valueSelector(element, value);

    }

  }



  function inputSelector(element, value) {

    if (Object.isUndefined(value))

      return element.checked ? element.value : null;

    else element.checked = !!value;

  }



  function valueSelector(element, value) {

    if (Object.isUndefined(value)) return element.value;

    else element.value = value;

  }



  function select(element, value) {

    if (Object.isUndefined(value))

      return (element.type === 'select-one' ? selectOne : selectMany)(element);



    var opt, currentValue, single = !Object.isArray(value);

    for (var i = 0, length = element.length; i < length; i++) {

      opt = element.options[i];

      currentValue = this.optionValue(opt);

      if (single) {

        if (currentValue == value) {

          opt.selected = true;

          return;

        }

      }

      else opt.selected = value.include(currentValue);

    }

  }



  function selectOne(element) {

    var index = element.selectedIndex;

    return index >= 0 ? optionValue(element.options[index]) : null;

  }



  function selectMany(element) {

    var values, length = element.length;

    if (!length) return null;



    for (var i = 0, values = []; i < length; i++) {

      var opt = element.options[i];

      if (opt.selected) values.push(optionValue(opt));

    }

    return values;

  }



  function optionValue(opt) {

    return Element.hasAttribute(opt, 'value') ? opt.value : opt.text;

  }



  return {

    input:         input,

    inputSelector: inputSelector,

    textarea:      valueSelector,

    select:        select,

    selectOne:     selectOne,

    selectMany:    selectMany,

    optionValue:   optionValue,

    button:        valueSelector

  };

})();



/*--------------------------------------------------------------------------*/





Abstract.TimedObserver = Class.create(PeriodicalExecuter, {

  initialize: function($super, element, frequency, callback) {

    $super(callback, frequency);

    this.element   = $(element);

    this.lastValue = this.getValue();

  },



  execute: function() {

    var value = this.getValue();

    if (Object.isString(this.lastValue) && Object.isString(value) ?

        this.lastValue != value : String(this.lastValue) != String(value)) {

      this.callback(this.element, value);

      this.lastValue = value;

    }

  }

});



Form.Element.Observer = Class.create(Abstract.TimedObserver, {

  getValue: function() {

    return Form.Element.getValue(this.element);

  }

});



Form.Observer = Class.create(Abstract.TimedObserver, {

  getValue: function() {

    return Form.serialize(this.element);

  }

});



/*--------------------------------------------------------------------------*/



Abstract.EventObserver = Class.create({

  initialize: function(element, callback) {

    this.element  = $(element);

    this.callback = callback;



    this.lastValue = this.getValue();

    if (this.element.tagName.toLowerCase() == 'form')

      this.registerFormCallbacks();

    else

      this.registerCallback(this.element);

  },



  onElementEvent: function() {

    var value = this.getValue();

    if (this.lastValue != value) {

      this.callback(this.element, value);

      this.lastValue = value;

    }

  },



  registerFormCallbacks: function() {

    Form.getElements(this.element).each(this.registerCallback, this);

  },



  registerCallback: function(element) {

    if (element.type) {

      switch (element.type.toLowerCase()) {

        case 'checkbox':

        case 'radio':

          Event.observe(element, 'click', this.onElementEvent.bind(this));

          break;

        default:

          Event.observe(element, 'change', this.onElementEvent.bind(this));

          break;

      }

    }

  }

});



Form.Element.EventObserver = Class.create(Abstract.EventObserver, {

  getValue: function() {

    return Form.Element.getValue(this.element);

  }

});



Form.EventObserver = Class.create(Abstract.EventObserver, {

  getValue: function() {

    return Form.serialize(this.element);

  }

});

(function() {



  var Event = {

    KEY_BACKSPACE: 8,

    KEY_TAB:       9,

    KEY_RETURN:   13,

    KEY_ESC:      27,

    KEY_LEFT:     37,

    KEY_UP:       38,

    KEY_RIGHT:    39,

    KEY_DOWN:     40,

    KEY_DELETE:   46,

    KEY_HOME:     36,

    KEY_END:      35,

    KEY_PAGEUP:   33,

    KEY_PAGEDOWN: 34,

    KEY_INSERT:   45,



    cache: {}

  };



  var docEl = document.documentElement;

  var MOUSEENTER_MOUSELEAVE_EVENTS_SUPPORTED = 'onmouseenter' in docEl

    && 'onmouseleave' in docEl;







  var isIELegacyEvent = function(event) { return false; };



  if (window.attachEvent) {

    if (window.addEventListener) {

      isIELegacyEvent = function(event) {

        return !(event instanceof window.Event);

      };

    } else {

      isIELegacyEvent = function(event) { return true; };

    }

  }



  var _isButton;



  function _isButtonForDOMEvents(event, code) {

    return event.which ? (event.which === code + 1) : (event.button === code);

  }



  var legacyButtonMap = { 0: 1, 1: 4, 2: 2 };

  function _isButtonForLegacyEvents(event, code) {

    return event.button === legacyButtonMap[code];

  }



  function _isButtonForWebKit(event, code) {

    switch (code) {

      case 0: return event.which == 1 && !event.metaKey;

      case 1: return event.which == 2 || (event.which == 1 && event.metaKey);

      case 2: return event.which == 3;

      default: return false;

    }

  }



  if (window.attachEvent) {

    if (!window.addEventListener) {

      _isButton = _isButtonForLegacyEvents;

    } else {

      _isButton = function(event, code) {

        return isIELegacyEvent(event) ? _isButtonForLegacyEvents(event, code) :

         _isButtonForDOMEvents(event, code);

      }

    }

  } else if (Prototype.Browser.WebKit) {

    _isButton = _isButtonForWebKit;

  } else {

    _isButton = _isButtonForDOMEvents;

  }



  function isLeftClick(event)   { return _isButton(event, 0) }



  function isMiddleClick(event) { return _isButton(event, 1) }



  function isRightClick(event)  { return _isButton(event, 2) }



  function element(event) {

    event = Event.extend(event);



    var node = event.target, type = event.type,

     currentTarget = event.currentTarget;



    if (currentTarget && currentTarget.tagName) {

      if (type === 'load' || type === 'error' ||

        (type === 'click' && currentTarget.tagName.toLowerCase() === 'input'

          && currentTarget.type === 'radio'))

            node = currentTarget;

    }



    if (node.nodeType == Node.TEXT_NODE)

      node = node.parentNode;



    return Element.extend(node);

  }



  function findElement(event, expression) {

    var element = Event.element(event);



    if (!expression) return element;

    while (element) {

      if (Object.isElement(element) && Prototype.Selector.match(element, expression)) {

        return Element.extend(element);

      }

      element = element.parentNode;

    }

  }



  function pointer(event) {

    return { x: pointerX(event), y: pointerY(event) };

  }



  function pointerX(event) {

    var docElement = document.documentElement,

     body = document.body || { scrollLeft: 0 };



    return event.pageX || (event.clientX +

      (docElement.scrollLeft || body.scrollLeft) -

      (docElement.clientLeft || 0));

  }



  function pointerY(event) {

    var docElement = document.documentElement,

     body = document.body || { scrollTop: 0 };



    return  event.pageY || (event.clientY +

       (docElement.scrollTop || body.scrollTop) -

       (docElement.clientTop || 0));

  }





  function stop(event) {

    Event.extend(event);

    event.preventDefault();

    event.stopPropagation();



    event.stopped = true;

  }





  Event.Methods = {

    isLeftClick:   isLeftClick,

    isMiddleClick: isMiddleClick,

    isRightClick:  isRightClick,



    element:     element,

    findElement: findElement,



    pointer:  pointer,

    pointerX: pointerX,

    pointerY: pointerY,



    stop: stop

  };



  var methods = Object.keys(Event.Methods).inject({ }, function(m, name) {

    m[name] = Event.Methods[name].methodize();

    return m;

  });



  if (window.attachEvent) {

    function _relatedTarget(event) {

      var element;

      switch (event.type) {

        case 'mouseover':

        case 'mouseenter':

          element = event.fromElement;

          break;

        case 'mouseout':

        case 'mouseleave':

          element = event.toElement;

          break;

        default:

          return null;

      }

      return Element.extend(element);

    }



    var additionalMethods = {

      stopPropagation: function() { this.cancelBubble = true },

      preventDefault:  function() { this.returnValue = false },

      inspect: function() { return '[object Event]' }

    };



    Event.extend = function(event, element) {

      if (!event) return false;



      if (!isIELegacyEvent(event)) return event;



      if (event._extendedByPrototype) return event;

      event._extendedByPrototype = Prototype.emptyFunction;



      var pointer = Event.pointer(event);



      Object.extend(event, {

        target: event.srcElement || element,

        relatedTarget: _relatedTarget(event),

        pageX:  pointer.x,

        pageY:  pointer.y

      });



      Object.extend(event, methods);

      Object.extend(event, additionalMethods);



      return event;

    };

  } else {

    Event.extend = Prototype.K;

  }



  if (window.addEventListener) {

    Event.prototype = window.Event.prototype || document.createEvent('HTMLEvents').__proto__;

    Object.extend(Event.prototype, methods);

  }



  function _createResponder(element, eventName, handler) {

    var registry = Element.retrieve(element, 'prototype_event_registry');



    if (Object.isUndefined(registry)) {

      CACHE.push(element);

      registry = Element.retrieve(element, 'prototype_event_registry', $H());

    }



    var respondersForEvent = registry.get(eventName);

    if (Object.isUndefined(respondersForEvent)) {

      respondersForEvent = [];

      registry.set(eventName, respondersForEvent);

    }



    if (respondersForEvent.pluck('handler').include(handler)) return false;



    var responder;

    if (eventName.include(":")) {

      responder = function(event) {

        if (Object.isUndefined(event.eventName))

          return false;



        if (event.eventName !== eventName)

          return false;



        Event.extend(event, element);

        handler.call(element, event);

      };

    } else {

      if (!MOUSEENTER_MOUSELEAVE_EVENTS_SUPPORTED &&

       (eventName === "mouseenter" || eventName === "mouseleave")) {

        if (eventName === "mouseenter" || eventName === "mouseleave") {

          responder = function(event) {

            Event.extend(event, element);



            var parent = event.relatedTarget;

            while (parent && parent !== element) {

              try { parent = parent.parentNode; }

              catch(e) { parent = element; }

            }



            if (parent === element) return;



            handler.call(element, event);

          };

        }

      } else {

        responder = function(event) {

          Event.extend(event, element);

          handler.call(element, event);

        };

      }

    }



    responder.handler = handler;

    respondersForEvent.push(responder);

    return responder;

  }



  function _destroyCache() {

    for (var i = 0, length = CACHE.length; i < length; i++) {

      Event.stopObserving(CACHE[i]);

      CACHE[i] = null;

    }

  }



  var CACHE = [];



  if (Prototype.Browser.IE)

    window.attachEvent('onunload', _destroyCache);



  if (Prototype.Browser.WebKit)

    window.addEventListener('unload', Prototype.emptyFunction, false);





  var _getDOMEventName = Prototype.K,

      translations = { mouseenter: "mouseover", mouseleave: "mouseout" };



  if (!MOUSEENTER_MOUSELEAVE_EVENTS_SUPPORTED) {

    _getDOMEventName = function(eventName) {

      return (translations[eventName] || eventName);

    };

  }



  function observe(element, eventName, handler) {

    element = $(element);



    var responder = _createResponder(element, eventName, handler);



    if (!responder) return element;



    if (eventName.include(':')) {

      if (element.addEventListener)

        element.addEventListener("dataavailable", responder, false);

      else {

        element.attachEvent("ondataavailable", responder);

        element.attachEvent("onlosecapture", responder);

      }

    } else {

      var actualEventName = _getDOMEventName(eventName);



      if (element.addEventListener)

        element.addEventListener(actualEventName, responder, false);

      else

        element.attachEvent("on" + actualEventName, responder);

    }



    return element;

  }



  function stopObserving(element, eventName, handler) {

    element = $(element);



    var registry = Element.retrieve(element, 'prototype_event_registry');

    if (!registry) return element;



    if (!eventName) {

      registry.each( function(pair) {

        var eventName = pair.key;

        stopObserving(element, eventName);

      });

      return element;

    }



    var responders = registry.get(eventName);

    if (!responders) return element;



    if (!handler) {

      responders.each(function(r) {

        stopObserving(element, eventName, r.handler);

      });

      return element;

    }



    var i = responders.length, responder;

    while (i--) {

      if (responders[i].handler === handler) {

        responder = responders[i];

        break;

      }

    }

    if (!responder) return element;



    if (eventName.include(':')) {

      if (element.removeEventListener)

        element.removeEventListener("dataavailable", responder, false);

      else {

        element.detachEvent("ondataavailable", responder);

        element.detachEvent("onlosecapture", responder);

      }

    } else {

      var actualEventName = _getDOMEventName(eventName);

      if (element.removeEventListener)

        element.removeEventListener(actualEventName, responder, false);

      else

        element.detachEvent('on' + actualEventName, responder);

    }



    registry.set(eventName, responders.without(responder));



    return element;

  }



  function fire(element, eventName, memo, bubble) {

    element = $(element);



    if (Object.isUndefined(bubble))

      bubble = true;



    if (element == document && document.createEvent && !element.dispatchEvent)

      element = document.documentElement;



    var event;

    if (document.createEvent) {

      event = document.createEvent('HTMLEvents');

      event.initEvent('dataavailable', bubble, true);

    } else {

      event = document.createEventObject();

      event.eventType = bubble ? 'ondataavailable' : 'onlosecapture';

    }



    event.eventName = eventName;

    event.memo = memo || { };



    if (document.createEvent)

      element.dispatchEvent(event);

    else

      element.fireEvent(event.eventType, event);



    return Event.extend(event);

  }



  Event.Handler = Class.create({

    initialize: function(element, eventName, selector, callback) {

      this.element   = $(element);

      this.eventName = eventName;

      this.selector  = selector;

      this.callback  = callback;

      this.handler   = this.handleEvent.bind(this);

    },



    start: function() {

      Event.observe(this.element, this.eventName, this.handler);

      return this;

    },



    stop: function() {

      Event.stopObserving(this.element, this.eventName, this.handler);

      return this;

    },



    handleEvent: function(event) {

      var element = Event.findElement(event, this.selector);

      if (element) this.callback.call(this.element, event, element);

    }

  });



  function on(element, eventName, selector, callback) {

    element = $(element);

    if (Object.isFunction(selector) && Object.isUndefined(callback)) {

      callback = selector, selector = null;

    }



    return new Event.Handler(element, eventName, selector, callback).start();

  }



  Object.extend(Event, Event.Methods);



  Object.extend(Event, {

    fire:          fire,

    observe:       observe,

    stopObserving: stopObserving,

    on:            on

  });



  Element.addMethods({

    fire:          fire,



    observe:       observe,



    stopObserving: stopObserving,



    on:            on

  });



  Object.extend(document, {

    fire:          fire.methodize(),



    observe:       observe.methodize(),



    stopObserving: stopObserving.methodize(),



    on:            on.methodize(),



    loaded:        false

  });



  if (window.Event) Object.extend(window.Event, Event);

  else window.Event = Event;

})();



(function() {

  /* Support for the DOMContentLoaded event is based on work by Dan Webb,

     Matthias Miller, Dean Edwards, John Resig, and Diego Perini. */



  var timer;



  function fireContentLoadedEvent() {

    if (document.loaded) return;

    if (timer) window.clearTimeout(timer);

    document.loaded = true;

    document.fire('dom:loaded');

  }



  function checkReadyState() {

    if (document.readyState === 'complete') {

      document.stopObserving('readystatechange', checkReadyState);

      fireContentLoadedEvent();

    }

  }



  function pollDoScroll() {

    try { document.documentElement.doScroll('left'); }

    catch(e) {

      timer = pollDoScroll.defer();

      return;

    }

    fireContentLoadedEvent();

  }



  if (document.addEventListener) {

    document.addEventListener('DOMContentLoaded', fireContentLoadedEvent, false);

  } else {

    document.observe('readystatechange', checkReadyState);

    if (window == top)

      timer = pollDoScroll.defer();

  }



  Event.observe(window, 'load', fireContentLoadedEvent);

})();





Element.addMethods();

/*------------------------------- DEPRECATED -------------------------------*/



Hash.toQueryString = Object.toQueryString;



var Toggle = { display: Element.toggle };



Element.Methods.childOf = Element.Methods.descendantOf;



var Insertion = {

  Before: function(element, content) {

    return Element.insert(element, {before:content});

  },



  Top: function(element, content) {

    return Element.insert(element, {top:content});

  },



  Bottom: function(element, content) {

    return Element.insert(element, {bottom:content});

  },



  After: function(element, content) {

    return Element.insert(element, {after:content});

  }

};



var $continue = new Error('"throw $continue" is deprecated, use "return" instead');



var Position = {

  includeScrollOffsets: false,



  prepare: function() {

    this.deltaX =  window.pageXOffset

                || document.documentElement.scrollLeft

                || document.body.scrollLeft

                || 0;

    this.deltaY =  window.pageYOffset

                || document.documentElement.scrollTop

                || document.body.scrollTop

                || 0;

  },



  within: function(element, x, y) {

    if (this.includeScrollOffsets)

      return this.withinIncludingScrolloffsets(element, x, y);

    this.xcomp = x;

    this.ycomp = y;

    this.offset = Element.cumulativeOffset(element);



    return (y >= this.offset[1] &&

            y <  this.offset[1] + element.offsetHeight &&

            x >= this.offset[0] &&

            x <  this.offset[0] + element.offsetWidth);

  },



  withinIncludingScrolloffsets: function(element, x, y) {

    var offsetcache = Element.cumulativeScrollOffset(element);



    this.xcomp = x + offsetcache[0] - this.deltaX;

    this.ycomp = y + offsetcache[1] - this.deltaY;

    this.offset = Element.cumulativeOffset(element);



    return (this.ycomp >= this.offset[1] &&

            this.ycomp <  this.offset[1] + element.offsetHeight &&

            this.xcomp >= this.offset[0] &&

            this.xcomp <  this.offset[0] + element.offsetWidth);

  },



  overlap: function(mode, element) {

    if (!mode) return 0;

    if (mode == 'vertical')

      return ((this.offset[1] + element.offsetHeight) - this.ycomp) /

        element.offsetHeight;

    if (mode == 'horizontal')

      return ((this.offset[0] + element.offsetWidth) - this.xcomp) /

        element.offsetWidth;

  },





  cumulativeOffset: Element.Methods.cumulativeOffset,



  positionedOffset: Element.Methods.positionedOffset,



  absolutize: function(element) {

    Position.prepare();

    return Element.absolutize(element);

  },



  relativize: function(element) {

    Position.prepare();

    return Element.relativize(element);

  },



  realOffset: Element.Methods.cumulativeScrollOffset,



  offsetParent: Element.Methods.getOffsetParent,



  page: Element.Methods.viewportOffset,



  clone: function(source, target, options) {

    options = options || { };

    return Element.clonePosition(target, source, options);

  }

};



/*--------------------------------------------------------------------------*/



if (!document.getElementsByClassName) document.getElementsByClassName = function(instanceMethods){

  function iter(name) {

    return name.blank() ? null : "[contains(concat(' ', @class, ' '), ' " + name + " ')]";

  }



  instanceMethods.getElementsByClassName = Prototype.BrowserFeatures.XPath ?

  function(element, className) {

    className = className.toString().strip();

    var cond = /\s/.test(className) ? $w(className).map(iter).join('') : iter(className);

    return cond ? document._getElementsByXPath('.//*' + cond, element) : [];

  } : function(element, className) {

    className = className.toString().strip();

    var elements = [], classNames = (/\s/.test(className) ? $w(className) : null);

    if (!classNames && !className) return elements;



    var nodes = $(element).getElementsByTagName('*');

    className = ' ' + className + ' ';



    for (var i = 0, child, cn; child = nodes[i]; i++) {

      if (child.className && (cn = ' ' + child.className + ' ') && (cn.include(className) ||

          (classNames && classNames.all(function(name) {

            return !name.toString().blank() && cn.include(' ' + name + ' ');

          }))))

        elements.push(Element.extend(child));

    }

    return elements;

  };



  return function(className, parentElement) {

    return $(parentElement || document.body).getElementsByClassName(className);

  };

}(Element.Methods);



/*--------------------------------------------------------------------------*/



Element.ClassNames = Class.create();

Element.ClassNames.prototype = {

  initialize: function(element) {

    this.element = $(element);

  },



  _each: function(iterator) {

    this.element.className.split(/\s+/).select(function(name) {

      return name.length > 0;

    })._each(iterator);

  },



  set: function(className) {

    this.element.className = className;

  },



  add: function(classNameToAdd) {

    if (this.include(classNameToAdd)) return;

    this.set($A(this).concat(classNameToAdd).join(' '));

  },



  remove: function(classNameToRemove) {

    if (!this.include(classNameToRemove)) return;

    this.set($A(this).without(classNameToRemove).join(' '));

  },



  toString: function() {

    return $A(this).join(' ');

  }

};



Object.extend(Element.ClassNames.prototype, Enumerable);



/*--------------------------------------------------------------------------*/



(function() {

  window.Selector = Class.create({

    initialize: function(expression) {

      this.expression = expression.strip();

    },



    findElements: function(rootElement) {

      return Prototype.Selector.select(this.expression, rootElement);

    },



    match: function(element) {

      return Prototype.Selector.match(element, this.expression);

    },



    toString: function() {

      return this.expression;

    },



    inspect: function() {

      return "#<Selector: " + this.expression + ">";

    }

  });



  Object.extend(Selector, {

    matchElements: function(elements, expression) {

      var match = Prototype.Selector.match,

          results = [];



      for (var i = 0, length = elements.length; i < length; i++) {

        var element = elements[i];

        if (match(element, expression)) {

          results.push(Element.extend(element));

        }

      }

      return results;

    },



    findElement: function(elements, expression, index) {

      index = index || 0;

      var matchIndex = 0, element;

      for (var i = 0, length = elements.length; i < length; i++) {

        element = elements[i];

        if (Prototype.Selector.match(element, expression) && index === matchIndex++) {

          return Element.extend(element);

        }

      }

    },



    findChildElements: function(element, expressions) {

      var selector = expressions.toArray().join(', ');

      return Prototype.Selector.select(selector, element || document);

    }

  });

})();