text: var Prototype = { Version: '1.5.0_rc0', ScriptFragment: '(?:<script.*?>)((\n|\r|.)*?)(?:<\/script>)', emptyFunction: function() {}, K: function(x) {return x}
  }
  var Class = { create: function() { return function() { this.initialize.apply(this, arguments);}
  }
  }
  var Abstract = new Object(); Object.extend = function(destination, source) { for (var property in source) { destination[property] = source[property];}
  return destination;}
  Object.inspect = function(object) { try { if (object == undefined) return 'undefined'; if (object == null) return 'null'; return object.inspect ? object.inspect() : object.toString();} catch (e) { if (e instanceof RangeError) return '...'; throw e;}
  }
  Function.prototype.bind = function() { var __method = this, args = $A(arguments), object = args.shift(); return function() { return __method.apply(object, args.concat($A(arguments)));}
  }
  Function.prototype.bindAsEventListener = function(object) { var __method = this; return function(event) { return __method.call(object, event || window.event);}
  }
  Object.extend(Number.prototype, { toColorPart: function() { var digits = this.toString(16); if (this < 16) return '0' + digits; return digits;}, succ: function() { return this + 1;}, times: function(iterator) { $R(0, this, true).each(iterator); return this;}
  }); var Try = { these: function() { var returnValue; for (var i = 0; i < arguments.length; i++) { var lambda = arguments[i]; try { returnValue = lambda(); break;} catch (e) {}
  }
  return returnValue;}
  }
  var PeriodicalExecuter = Class.create(); PeriodicalExecuter.prototype = { initialize: function(callback, frequency) { this.callback = callback; this.frequency = frequency; this.currentlyExecuting = false; this.registerCallback();}, registerCallback: function() { setInterval(this.onTimerEvent.bind(this), this.frequency * 1000);}, onTimerEvent: function() { if (!this.currentlyExecuting) { try { this.currentlyExecuting = true; this.callback();} finally { this.currentlyExecuting = false;}
  }
  }
  }
  Object.extend(String.prototype, { gsub: function(pattern, replacement) { var result = '', source = this, match; replacement = arguments.callee.prepareReplacement(replacement); while (source.length > 0) { if (match = source.match(pattern)) { result += source.slice(0, match.index); result += (replacement(match) || '').toString(); source = source.slice(match.index + match[0].length);} else { result += source, source = '';}
  }
  return result;}, sub: function(pattern, replacement, count) { replacement = this.gsub.prepareReplacement(replacement); count = count === undefined ? 1 : count; return this.gsub(pattern, function(match) { if (--count < 0) return match[0]; return replacement(match);});}, scan: function(pattern, iterator) { this.gsub(pattern, iterator); return this;}, truncate: function(length, truncation) { length = length || 30; truncation = truncation === undefined ? '...' : truncation; return this.length > length ?
  this.slice(0, length - truncation.length) + truncation : this;}, strip: function() { return this.replace(/^\s+/, '').replace(/\s+$/, '');}, stripTags: function() { return this.replace(/<\/?[^>]+>/gi, '');}, stripScripts: function() { return this.replace(new RegExp(Prototype.ScriptFragment, 'img'), '');}, extractScripts: function() { var matchAll = new RegExp(Prototype.ScriptFragment, 'img'); var matchOne = new RegExp(Prototype.ScriptFragment, 'im'); return (this.match(matchAll) || []).map(function(scriptTag) { return (scriptTag.match(matchOne) || ['', ''])[1];});}, evalScripts: function() { return this.extractScripts().map(function(script) { return eval(script) });}, escapeHTML: function() { var div = document.createElement('div'); var text = document.createTextNode(this); div.appendChild(text); return div.innerHTML;}, unescapeHTML: function() { var div = document.createElement('div'); div.innerHTML = this.stripTags(); return div.childNodes[0] ? div.childNodes[0].nodeValue : '';}, toQueryParams: function() { var pairs = this.match(/^\??(.*)$/)[1].split('&'); return pairs.inject({}, function(params, pairString) { var pair = pairString.split('='); params[pair[0]] = pair[1]; return params;});}, toArray: function() { return this.split('');}, camelize: function() { var oStringList = this.split('-'); if (oStringList.length == 1) return oStringList[0]; var camelizedString = this.indexOf('-') == 0
  ? oStringList[0].charAt(0).toUpperCase() + oStringList[0].substring(1)
  : oStringList[0]; for (var i = 1, len = oStringList.length; i < len; i++) { var s = oStringList[i]; camelizedString += s.charAt(0).toUpperCase() + s.substring(1);}
  return camelizedString;}, inspect: function() { return "'" + this.replace(/\\/g, '\\\\').replace(/'/g, '\\\'') + "'";
    }
  });
  
  String.prototype.gsub.prepareReplacement = function(replacement) {
    if (typeof replacement == 'function') return replacement;
    var template = new Template(replacement);
    return function(match) { return template.evaluate(match) };
  }
  
  String.prototype.parseQuery = String.prototype.toQueryParams;
  
  var Template = Class.create();
  Template.Pattern = /(^|.|\r|\n)(#\{(.*?)\})/;
  Template.prototype = {
    initialize: function(template, pattern) {
      this.template = template.toString();
      this.pattern  = pattern || Template.Pattern;
    },
  
    evaluate: function(object) {
      return this.template.gsub(this.pattern, function(match) {
        var before = match[1];
        if (before == '\\') return match[2];
        return before + (object[match[3]] || '').toString();
      });
    }
  }
  
  var $break    = new Object();
  var $continue = new Object();
  
  var Enumerable = {
    each: function(iterator) {
      var index = 0;
      try {
        this._each(function(value) {
          try {
            iterator(value, index++);
          } catch (e) {
            if (e != $continue) throw e;
          }
        });
      } catch (e) {
        if (e != $break) throw e;
      }
    },
  
    all: function(iterator) {
      var result = true;
      this.each(function(value, index) {
        result = result && !!(iterator || Prototype.K)(value, index);
        if (!result) throw $break;
      });
      return result;
    },
  
    any: function(iterator) {
      var result = true;
      this.each(function(value, index) {
        if (result = !!(iterator || Prototype.K)(value, index))
          throw $break;
      });
      return result;
    },
  
    collect: function(iterator) {
      var results = [];
      this.each(function(value, index) {
        results.push(iterator(value, index));
      });
      return results;
    },
  
    detect: function (iterator) {
      var result;
      this.each(function(value, index) {
        if (iterator(value, index)) {
          result = value;
          throw $break;
        }
      });
      return result;
    },
  
    findAll: function(iterator) {
      var results = [];
      this.each(function(value, index) {
        if (iterator(value, index))
          results.push(value);
      });
      return results;
    },
  
    grep: function(pattern, iterator) {
      var results = [];
      this.each(function(value, index) {
        var stringValue = value.toString();
        if (stringValue.match(pattern))
          results.push((iterator || Prototype.K)(value, index));
      })
      return results;
    },
  
    include: function(object) {
      var found = false;
      this.each(function(value) {
        if (value == object) {
          found = true;
          throw $break;
        }
      });
      return found;
    },
  
    inject: function(memo, iterator) {
      this.each(function(value, index) {
        memo = iterator(memo, value, index);
      });
      return memo;
    },
  
    invoke: function(method) {
      var args = $A(arguments).slice(1);
      return this.collect(function(value) {
        return value[method].apply(value, args);
      });
    },
  
    max: function(iterator) {
      var result;
      this.each(function(value, index) {
        value = (iterator || Prototype.K)(value, index);
        if (result == undefined || value >= result)
          result = value;
      });
      return result;
    },
  
    min: function(iterator) {
      var result;
      this.each(function(value, index) {
        value = (iterator || Prototype.K)(value, index);
        if (result == undefined || value < result)
          result = value;
      });
      return result;
    },
  
    partition: function(iterator) {
      var trues = [], falses = [];
      this.each(function(value, index) {
        ((iterator || Prototype.K)(value, index) ?
          trues : falses).push(value);
      });
      return [trues, falses];
    },
  
    pluck: function(property) {
      var results = [];
      this.each(function(value, index) {
        results.push(value[property]);
      });
      return results;
    },
  
    reject: function(iterator) {
      var results = [];
      this.each(function(value, index) {
        if (!iterator(value, index))
          results.push(value);
      });
      return results;
    },
  
    sortBy: function(iterator) {
      return this.collect(function(value, index) {
        return {value: value, criteria: iterator(value, index)};
      }).sort(function(left, right) {
        var a = left.criteria, b = right.criteria;
        return a < b ? -1 : a > b ? 1 : 0;
      }).pluck('value');
    },
  
    toArray: function() {
      return this.collect(Prototype.K);
    },
  
    zip: function() {
      var iterator = Prototype.K, args = $A(arguments);
      if (typeof args.last() == 'function')
        iterator = args.pop();
  
      var collections = [this].concat(args).map($A);
      return this.map(function(value, index) {
        return iterator(collections.pluck(index));
      });
    },
  
    inspect: function() {
      return '#<Enumerable:' + this.toArray().inspect() + '>';
    }
  }
  
  Object.extend(Enumerable, {
    map:     Enumerable.collect,
    find:    Enumerable.detect,
    select:  Enumerable.findAll,
    member:  Enumerable.include,
    entries: Enumerable.toArray
  });
  var $A = Array.from = function(iterable) {
    if (!iterable) return [];
    if (iterable.toArray) {
      return iterable.toArray();
    } else {
      var results = [];
      for (var i = 0; i < iterable.length; i++)
        results.push(iterable[i]);
      return results;
    }
  }
  
  Object.extend(Array.prototype, Enumerable);
  
  if (!Array.prototype._reverse)
    Array.prototype._reverse = Array.prototype.reverse;
  
  Object.extend(Array.prototype, {
    _each: function(iterator) {
      for (var i = 0; i < this.length; i++)
        iterator(this[i]);
    },
  
    clear: function() {
      this.length = 0;
      return this;
    },
  
    first: function() {
      return this[0];
    },
  
    last: function() {
      return this[this.length - 1];
    },
  
    compact: function() {
      return this.select(function(value) {
        return value != undefined || value != null;
      });
    },
  
    flatten: function() {
      return this.inject([], function(array, value) {
        return array.concat(value && value.constructor == Array ?
          value.flatten() : [value]);
      });
    },
  
    without: function() {
      var values = $A(arguments);
      return this.select(function(value) {
        return !values.include(value);
      });
    },
  
    indexOf: function(object) {
      for (var i = 0; i < this.length; i++)
        if (this[i] == object) return i;
      return -1;
    },
  
    reverse: function(inline) {
      return (inline !== false ? this : this.toArray())._reverse();
    },
  
    inspect: function() {
      return '[' + this.map(Object.inspect).join(', ') + ']';
    }
  });
  var Hash = {
    _each: function(iterator) {
      for (var key in this) {
        var value = this[key];
        if (typeof value == 'function') continue;
  
        var pair = [key, value];
        pair.key = key;
        pair.value = value;
        iterator(pair);
      }
    },
  
    keys: function() {
      return this.pluck('key');
    },
  
    values: function() {
      return this.pluck('value');
    },
  
    merge: function(hash) {
      return $H(hash).inject($H(this), function(mergedHash, pair) {
        mergedHash[pair.key] = pair.value;
        return mergedHash;
      });
    },
  
    toQueryString: function() {
      return this.map(function(pair) {
        return pair.map(encodeURIComponent).join('=');
      }).join('&');
    },
  
    inspect: function() {
      return '#<Hash:{' + this.map(function(pair) {
        return pair.map(Object.inspect).join(': ');
      }).join(', ') + '}>';
    }
  }
  
  function $H(object) {
    var hash = Object.extend({}, object || {});
    Object.extend(hash, Enumerable);
    Object.extend(hash, Hash);
    return hash;
  }
  ObjectRange = Class.create();
  Object.extend(ObjectRange.prototype, Enumerable);
  Object.extend(ObjectRange.prototype, {
    initialize: function(start, end, exclusive) {
      this.start = start;
      this.end = end;
      this.exclusive = exclusive;
    },
  
    _each: function(iterator) {
      var value = this.start;
      do {
        iterator(value);
        value = value.succ();
      } while (this.include(value));
    },
  
    include: function(value) {
      if (value < this.start)
        return false;
      if (this.exclusive)
        return value < this.end;
      return value <= this.end;
    }
  });
  
  var $R = function(start, end, exclusive) {
    return new ObjectRange(start, end, exclusive);
  }
  
  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(responderToAdd) {
      if (!this.include(responderToAdd))
        this.responders.push(responderToAdd);
    },
  
    unregister: function(responderToRemove) {
      this.responders = this.responders.without(responderToRemove);
    },
  
    dispatch: function(callback, request, transport, json) {
      this.each(function(responder) {
        if (responder[callback] && typeof responder[callback] == 'function') {
          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 = function() {};
  Ajax.Base.prototype = {
    setOptions: function(options) {
      this.options = {
        method:       'post',
        asynchronous: true,
        contentType:  'application/x-www-form-urlencoded',
        parameters:   ''
      }
      Object.extend(this.options, options || {});
    },
  
    responseIsSuccess: function() {
      return this.transport.status == undefined
          || this.transport.status == 0
          || (this.transport.status >= 200 && this.transport.status < 300);
    },
  
    responseIsFailure: function() {
      return !this.responseIsSuccess();
    }
  }
  
  Ajax.Request = Class.create();
  Ajax.Request.Events =
    ['Uninitialized', 'Loading', 'Loaded', 'Interactive', 'Complete'];
  
  Ajax.Request.prototype = Object.extend(new Ajax.Base(), {
    initialize: function(url, options) {
      this.transport = Ajax.getTransport();
      this.setOptions(options);
      this.request(url);
    },
  
    request: function(url) {
      var parameters = this.options.parameters || '';
      if (parameters.length > 0) parameters += '&_=';
  
      try {
        this.url = url;
        if (this.options.method == 'get' && parameters.length > 0)
          this.url += (this.url.match(/\?/) ? '&' : '?') + parameters;
  
        Ajax.Responders.dispatch('onCreate', this, this.transport);
  
        this.transport.open(this.options.method, this.url,
          this.options.asynchronous);
  
        if (this.options.asynchronous) {
          this.transport.onreadystatechange = this.onStateChange.bind(this);
          setTimeout((function() {this.respondToReadyState(1)}).bind(this), 10);
        }
  
        this.setRequestHeaders();
  
        var body = this.options.postBody ? this.options.postBody : parameters;
        this.transport.send(this.options.method == 'post' ? body : null);
  
      } catch (e) {
        this.dispatchException(e);
      }
    },
  
    setRequestHeaders: function() {
      var requestHeaders =
        ['X-Requested-With', 'XMLHttpRequest',
         'X-Prototype-Version', Prototype.Version,
         'Accept', 'text/javascript, text/html, application/xml, text/xml, */*'];
  
      if (this.options.method == 'post') {
        requestHeaders.push('Content-type', this.options.contentType);
  
        /* Force "Connection: close" for Mozilla browsers to work around
         * a bug where XMLHttpReqeuest sends an incorrect Content-length
         * header. See Mozilla Bugzilla #246651.
         */
        if (this.transport.overrideMimeType)
          requestHeaders.push('Connection', 'close');
      }
  
      if (this.options.requestHeaders)
        requestHeaders.push.apply(requestHeaders, this.options.requestHeaders);
  
      for (var i = 0; i < requestHeaders.length; i += 2)
        this.transport.setRequestHeader(requestHeaders[i], requestHeaders[i+1]);
    },
  
    onStateChange: function() {
      var readyState = this.transport.readyState;
      if (readyState != 1)
        this.respondToReadyState(this.transport.readyState);
    },
  
    header: function(name) {
      try {
        return this.transport.getResponseHeader(name);
      } catch (e) {}
    },
  
    evalJSON: function() {
      try {
        return eval('(' + this.header('X-JSON') + ')');
      } catch (e) {}
    },
  
    evalResponse: function() {
      try {
        return eval(this.transport.responseText);
      } catch (e) {
        this.dispatchException(e);
      }
    },
  
    respondToReadyState: function(readyState) {
      var event = Ajax.Request.Events[readyState];
      var transport = this.transport, json = this.evalJSON();
  
      if (event == 'Complete') {
        try {
          (this.options['on' + this.transport.status]
           || this.options['on' + (this.responseIsSuccess() ? 'Success' : 'Failure')]
           || Prototype.emptyFunction)(transport, json);
        } catch (e) {
          this.dispatchException(e);
        }
  
        if ((this.header('Content-type') || '').match(/^text\/javascript/i))
          this.evalResponse();
      }
  
      try {
        (this.options['on' + event] || Prototype.emptyFunction)(transport, json);
        Ajax.Responders.dispatch('on' + event, this, transport, json);
      } catch (e) {
        this.dispatchException(e);
      }
  
      /* Avoid memory leak in MSIE: clean up the oncomplete event handler */
      if (event == 'Complete')
        this.transport.onreadystatechange = Prototype.emptyFunction;
    },
  
    dispatchException: function(exception) {
      (this.options.onException || Prototype.emptyFunction)(this, exception);
      Ajax.Responders.dispatch('onException', this, exception);
    }
  });
  
  Ajax.Updater = Class.create();
  
  Object.extend(Object.extend(Ajax.Updater.prototype, Ajax.Request.prototype), {
    initialize: function(container, url, options) {
      this.containers = {
        success: container.success ? $(container.success) : $(container),
        failure: container.failure ? $(container.failure) :
          (container.success ? null : $(container))
      }
  
      this.transport = Ajax.getTransport();
      this.setOptions(options);
  
      var onComplete = this.options.onComplete || Prototype.emptyFunction;
      this.options.onComplete = (function(transport, object) {
        this.updateContent();
        onComplete(transport, object);
      }).bind(this);
  
      this.request(url);
    },
  
    updateContent: function() {
      var receiver = this.responseIsSuccess() ?
        this.containers.success : this.containers.failure;
      var response = this.transport.responseText;
  
      if (!this.options.evalScripts)
        response = response.stripScripts();
  
      if (receiver) {
        if (this.options.insertion) {
          new this.options.insertion(receiver, response);
        } else {
          Element.update(receiver, response);
        }
      }
  
      if (this.responseIsSuccess()) {
        if (this.onComplete)
          setTimeout(this.onComplete.bind(this), 10);
      }
    }
  });
  
  Ajax.PeriodicalUpdater = Class.create();
  Ajax.PeriodicalUpdater.prototype = Object.extend(new Ajax.Base(), {
    initialize: function(container, url, options) {
      this.setOptions(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.onComplete = undefined;
      clearTimeout(this.timer);
      (this.onComplete || Prototype.emptyFunction).apply(this, arguments);
    },
  
    updateComplete: function(request) {
      if (this.options.decay) {
        this.decay = (request.responseText == this.lastText ?
          this.decay * this.options.decay : 1);
  
        this.lastText = request.responseText;
      }
      this.timer = setTimeout(this.onTimerEvent.bind(this),
        this.decay * this.frequency * 1000);
    },
  
    onTimerEvent: function() {
      this.updater = new Ajax.Updater(this.container, this.url, this.options);
    }
  });
  function $() {
    var results = [], element;
    for (var i = 0; i < arguments.length; i++) {
      element = arguments[i];
      if (typeof element == 'string')
        element = document.getElementById(element);
      results.push(Element.extend(element));
    }
    return results.length < 2 ? results[0] : results;
  }
  
  document.getElementsByClassName = function(className, parentElement) {
    var children = ($(parentElement) || document.body).getElementsByTagName('*');
    return $A(children).inject([], function(elements, child) {
      if (child.className.match(new RegExp("(^|\\s)" + className + "(\\s|$)")))
        elements.push(Element.extend(child));
      return elements;
    });
  }
  
  /*--------------------------------------------------------------------------*/
  
  if (!window.Element)
    var Element = new Object();
  
  Element.extend = function(element) {
    if (!element) return;
    if (_nativeExtensions) return element;
  
    if (!element._extended && element.tagName && element != window) {
      var methods = Element.Methods, cache = Element.extend.cache;
      for (property in methods) {
        var value = methods[property];
        if (typeof value == 'function')
          element[property] = cache.findOrStore(value);
      }
    }
  
    element._extended = true;
    return element;
  }
  
  Element.extend.cache = {
    findOrStore: function(value) {
      return this[value] = this[value] || function() {
        return value.apply(null, [this].concat($A(arguments)));
      }
    }
  }
  
  Element.Methods = {
    visible: function(element) {
      return $(element).style.display != 'none';
    },
  
    toggle: function() {
      for (var i = 0; i < arguments.length; i++) {
        var element = $(arguments[i]);
        Element[Element.visible(element) ? 'hide' : 'show'](element);
      }
    },
  
    hide: function() {
      for (var i = 0; i < arguments.length; i++) {
        var element = $(arguments[i]);
        element.style.display = 'none';
      }
    },
  
    show: function() {
      for (var i = 0; i < arguments.length; i++) {
        var element = $(arguments[i]);
        element.style.display = '';
      }
    },
  
    remove: function(element) {
      element = $(element);
      element.parentNode.removeChild(element);
    },
  
    update: function(element, html) {
      $(element).innerHTML = html.stripScripts();
      setTimeout(function() {html.evalScripts()}, 10);
    },
  
    replace: function(element, html) {
      element = $(element);
      if (element.outerHTML) {
        element.outerHTML = html.stripScripts();
      } else {
        var range = element.ownerDocument.createRange();
        range.selectNodeContents(element);
        element.parentNode.replaceChild(
          range.createContextualFragment(html.stripScripts()), element);
      }
      setTimeout(function() {html.evalScripts()}, 10);
    },
  
    getHeight: function(element) {
      element = $(element);
      return element.offsetHeight;
    },
  
    classNames: function(element) {
      return new Element.ClassNames(element);
    },
  
    hasClassName: function(element, className) {
      if (!(element = $(element))) return;
      return Element.classNames(element).include(className);
    },
  
    addClassName: function(element, className) {
      if (!(element = $(element))) return;
      return Element.classNames(element).add(className);
    },
  
    removeClassName: function(element, className) {
      if (!(element = $(element))) return;
      return Element.classNames(element).remove(className);
    },
  
    // removes whitespace-only text node children
    cleanWhitespace: function(element) {
      element = $(element);
      for (var i = 0; i < element.childNodes.length; i++) {
        var node = element.childNodes[i];
        if (node.nodeType == 3 && !/\S/.test(node.nodeValue))
          Element.remove(node);
      }
    },
  
    empty: function(element) {
      return $(element).innerHTML.match(/^\s*$/);
    },
  
    childOf: function(element, ancestor) {
      element = $(element), ancestor = $(ancestor);
      while (element = element.parentNode)
        if (element == ancestor) return true;
      return false;
    },
  
    scrollTo: function(element) {
      element = $(element);
      var x = element.x ? element.x : element.offsetLeft,
          y = element.y ? element.y : element.offsetTop;
      window.scrollTo(x, y);
    },
  
    getStyle: function(element, style) {
      element = $(element);
      var value = element.style[style.camelize()];
      if (!value) {
        if (document.defaultView && document.defaultView.getComputedStyle) {
          var css = document.defaultView.getComputedStyle(element, null);
          value = css ? css.getPropertyValue(style) : null;
        } else if (element.currentStyle) {
          value = element.currentStyle[style.camelize()];
        }
      }
  
      if (window.opera && ['left', 'top', 'right', 'bottom'].include(style))
        if (Element.getStyle(element, 'position') == 'static') value = 'auto';
  
      return value == 'auto' ? null : value;
    },
  
    setStyle: function(element, style) {
      element = $(element);
      for (var name in style)
        element.style[name.camelize()] = style[name];
    },
  
    getDimensions: function(element) {
      element = $(element);
      if (Element.getStyle(element, 'display') != 'none')
        return {width: element.offsetWidth, height: element.offsetHeight};
  
      // All *Width and *Height properties give 0 on elements with display none,
      // so enable the element temporarily
      var els = element.style;
      var originalVisibility = els.visibility;
      var originalPosition = els.position;
      els.visibility = 'hidden';
      els.position = 'absolute';
      els.display = '';
      var originalWidth = element.clientWidth;
      var originalHeight = element.clientHeight;
      els.display = 'none';
      els.position = originalPosition;
      els.visibility = originalVisibility;
      return {width: originalWidth, height: originalHeight};
    },
  
    makePositioned: function(element) {
      element = $(element);
      var pos = Element.getStyle(element, 'position');
      if (pos == 'static' || !pos) {
        element._madePositioned = true;
        element.style.position = 'relative';
        // Opera returns the offset relative to the positioning context, when an
        // element is position relative but top and left have not been defined
        if (window.opera) {
          element.style.top = 0;
          element.style.left = 0;
        }
      }
    },
  
    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 = '';
      }
    },
  
    makeClipping: function(element) {
      element = $(element);
      if (element._overflow) return;
      element._overflow = element.style.overflow;
      if ((Element.getStyle(element, 'overflow') || 'visible') != 'hidden')
        element.style.overflow = 'hidden';
    },
  
    undoClipping: function(element) {
      element = $(element);
      if (element._overflow) return;
      element.style.overflow = element._overflow;
      element._overflow = undefined;
    }
  }
  
  Object.extend(Element, Element.Methods);
  
  var _nativeExtensions = false;
  
  if(!HTMLElement && /Konqueror|Safari|KHTML/.test(navigator.userAgent)) {
    var HTMLElement = {}
    HTMLElement.prototype = document.createElement('div').__proto__;
  }
  
  Element.addMethods = function(methods) {
    Object.extend(Element.Methods, methods || {});
  
    if(typeof HTMLElement != 'undefined') {
      var methods = Element.Methods, cache = Element.extend.cache;
      for (property in methods) {
        var value = methods[property];
        if (typeof value == 'function')
          HTMLElement.prototype[property] = cache.findOrStore(value);
      }
      _nativeExtensions = true;
    }
  }
  
  Element.addMethods();
  
  var Toggle = new Object();
  Toggle.display = Element.toggle;
  
  /*--------------------------------------------------------------------------*/
  
  Abstract.Insertion = function(adjacency) {
    this.adjacency = adjacency;
  }
  
  Abstract.Insertion.prototype = {
    initialize: function(element, content) {
      this.element = $(element);
      this.content = content.stripScripts();
  
      if (this.adjacency && this.element.insertAdjacentHTML) {
        try {
          this.element.insertAdjacentHTML(this.adjacency, this.content);
        } catch (e) {
          var tagName = this.element.tagName.toLowerCase();
          if (tagName == 'tbody' || tagName == 'tr') {
            this.insertContent(this.contentFromAnonymousTable());
          } else {
            throw e;
          }
        }
      } else {
        this.range = this.element.ownerDocument.createRange();
        if (this.initializeRange) this.initializeRange();
        this.insertContent([this.range.createContextualFragment(this.content)]);
      }
  
      setTimeout(function() {content.evalScripts()}, 10);
    },
  
    contentFromAnonymousTable: function() {
      var div = document.createElement('div');
      div.innerHTML = '<table><tbody>' + this.content + '</tbody></table>';
      return $A(div.childNodes[0].childNodes[0].childNodes);
    }
  }
  
  var Insertion = new Object();
  
  Insertion.Before = Class.create();
  Insertion.Before.prototype = Object.extend(new Abstract.Insertion('beforeBegin'), {
    initializeRange: function() {
      this.range.setStartBefore(this.element);
    },
  
    insertContent: function(fragments) {
      fragments.each((function(fragment) {
        this.element.parentNode.insertBefore(fragment, this.element);
      }).bind(this));
    }
  });
  
  Insertion.Top = Class.create();
  Insertion.Top.prototype = Object.extend(new Abstract.Insertion('afterBegin'), {
    initializeRange: function() {
      this.range.selectNodeContents(this.element);
      this.range.collapse(true);
    },
  
    insertContent: function(fragments) {
      fragments.reverse(false).each((function(fragment) {
        this.element.insertBefore(fragment, this.element.firstChild);
      }).bind(this));
    }
  });
  
  Insertion.Bottom = Class.create();
  Insertion.Bottom.prototype = Object.extend(new Abstract.Insertion('beforeEnd'), {
    initializeRange: function() {
      this.range.selectNodeContents(this.element);
      this.range.collapse(this.element);
    },
  
    insertContent: function(fragments) {
      fragments.each((function(fragment) {
        this.element.appendChild(fragment);
      }).bind(this));
    }
  });
  
  Insertion.After = Class.create();
  Insertion.After.prototype = Object.extend(new Abstract.Insertion('afterEnd'), {
    initializeRange: function() {
      this.range.setStartAfter(this.element);
    },
  
    insertContent: function(fragments) {
      fragments.each((function(fragment) {
        this.element.parentNode.insertBefore(fragment,
          this.element.nextSibling);
      }).bind(this));
    }
  });
  
  /*--------------------------------------------------------------------------*/
  
  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(this.toArray().concat(classNameToAdd).join(' '));
    },
  
    remove: function(classNameToRemove) {
      if (!this.include(classNameToRemove)) return;
      this.set(this.select(function(className) {
        return className != classNameToRemove;
      }).join(' '));
    },
  
    toString: function() {
      return this.toArray().join(' ');
    }
  }
  
  Object.extend(Element.ClassNames.prototype, Enumerable);
  var Selector = Class.create();
  Selector.prototype = {
    initialize: function(expression) {
      this.params = {classNames: []};
      this.expression = expression.toString().strip();
      this.parseExpression();
      this.compileMatcher();
    },
  
    parseExpression: function() {
      function abort(message) { throw 'Parse error in selector: ' + message; }
  
      if (this.expression == '')  abort('empty expression');
  
      var params = this.params, expr = this.expression, match, modifier, clause, rest;
      while (match = expr.match(/^(.*)\[([a-z0-9_:-]+?)(?:([~\|!]?=)(?:"([^"]*)"|([^\]\s]*)))?\]$/i)) { params.attributes = params.attributes || []; params.attributes.push({name: match[2], operator: match[3], value: match[4] || match[5] || ''}); expr = match[1];}
  if (expr == '*') return this.params.wildcard = true; while (match = expr.match(/^([^a-z0-9_-])?([a-z0-9_-]+)(.*)/i)) { modifier = match[1], clause = match[2], rest = match[3]; switch (modifier) { case '#': params.id = clause; break; case '.': params.classNames.push(clause); break; case '':
  case undefined: params.tagName = clause.toUpperCase(); break; default: abort(expr.inspect());}
  expr = rest;}
  if (expr.length > 0) abort(expr.inspect());}, buildMatchExpression: function() { var params = this.params, conditions = [], clause; if (params.wildcard)
  conditions.push('true'); if (clause = params.id)
  conditions.push('element.id == ' + clause.inspect()); if (clause = params.tagName)
  conditions.push('element.tagName.toUpperCase() == ' + clause.inspect()); if ((clause = params.classNames).length > 0)
  for (var i = 0; i < clause.length; i++)
  conditions.push('Element.hasClassName(element, ' + clause[i].inspect() + ')'); if (clause = params.attributes) { clause.each(function(attribute) { var value = 'element.getAttribute(' + attribute.name.inspect() + ')'; var splitValueBy = function(delimiter) { return value + ' && ' + value + '.split(' + delimiter.inspect() + ')';}
  switch (attribute.operator) { case '=': conditions.push(value + ' == ' + attribute.value.inspect()); break; case '~=': conditions.push(splitValueBy(' ') + '.include(' + attribute.value.inspect() + ')'); break; case '|=': conditions.push( splitValueBy('-') + '.first().toUpperCase() == ' + attribute.value.toUpperCase().inspect() ); break; case '!=': conditions.push(value + ' != ' + attribute.value.inspect()); break; case '':
  case undefined: conditions.push(value + ' != null'); break; default: throw 'Unknown operator ' + attribute.operator + ' in selector';}
  });}
  return conditions.join(' && ');}, compileMatcher: function() { this.match = new Function('element', 'if (!element.tagName) return false; \
        return ' + this.buildMatchExpression());}, findElements: function(scope) { var element; if (element = $(this.params.id))
  if (this.match(element))
  if (!scope || Element.childOf(element, scope))
  return [element]; scope = (scope || document).getElementsByTagName(this.params.tagName || '*'); var results = []; for (var i = 0; i < scope.length; i++)
  if (this.match(element = scope[i]))
  results.push(Element.extend(element)); return results;}, toString: function() { return this.expression;}
  }
  function $$() { return $A(arguments).map(function(expression) { return expression.strip().split(/\s+/).inject([null], function(results, expr) { var selector = new Selector(expr); return results.map(selector.findElements.bind(selector)).flatten();});}).flatten();}
  var Field = { clear: function() { for (var i = 0; i < arguments.length; i++)
  $(arguments[i]).value = '';}, focus: function(element) { $(element).focus();}, present: function() { for (var i = 0; i < arguments.length; i++)
  if ($(arguments[i]).value == '') return false; return true;}, select: function(element) { $(element).select();}, activate: function(element) { element = $(element); element.focus(); if (element.select)
  element.select();}
  }
  var Form = { serialize: function(form) { var elements = Form.getElements($(form)); var queryComponents = new Array(); for (var i = 0; i < elements.length; i++) { var queryComponent = Form.Element.serialize(elements[i]); if (queryComponent)
  queryComponents.push(queryComponent);}
  return queryComponents.join('&');}, getElements: function(form) { form = $(form); var elements = new Array(); for (var tagName in Form.Element.Serializers) { var tagElements = form.getElementsByTagName(tagName); for (var j = 0; j < tagElements.length; j++)
  elements.push(tagElements[j]);}
  return elements;}, getInputs: function(form, typeName, name) { form = $(form); var inputs = form.getElementsByTagName('input'); if (!typeName && !name)
  return inputs; var matchingInputs = new Array(); for (var i = 0; i < inputs.length; i++) { var input = inputs[i]; if ((typeName && input.type != typeName) || (name && input.name != name))
  continue; matchingInputs.push(input);}
  return matchingInputs;}, disable: function(form) { var elements = Form.getElements(form); for (var i = 0; i < elements.length; i++) { var element = elements[i]; element.blur(); element.disabled = 'true';}
  }, enable: function(form) { var elements = Form.getElements(form); for (var i = 0; i < elements.length; i++) { var element = elements[i]; element.disabled = '';}
  }, findFirstElement: function(form) { return Form.getElements(form).find(function(element) { return element.type != 'hidden' && !element.disabled &&
  ['input', 'select', 'textarea'].include(element.tagName.toLowerCase());});}, focusFirstElement: function(form) { Field.activate(Form.findFirstElement(form));}, reset: function(form) { $(form).reset();}
  }
  Form.Element = { serialize: function(element) { element = $(element); var method = element.tagName.toLowerCase(); var parameter = Form.Element.Serializers[method](element); if (parameter) { var key = encodeURIComponent(parameter[0]); if (key.length == 0) return; if (parameter[1].constructor != Array)
  parameter[1] = [parameter[1]]; return parameter[1].map(function(value) { return key + '=' + encodeURIComponent(value);}).join('&');}
  }, getValue: function(element) { element = $(element); var method = element.tagName.toLowerCase(); var parameter = Form.Element.Serializers[method](element); if (parameter)
  return parameter[1];}
  }
  Form.Element.Serializers = { input: function(element) { switch (element.type.toLowerCase()) { case 'submit':
  case 'hidden':
  case 'password':
  case 'text':
  return Form.Element.Serializers.textarea(element); case 'checkbox':
  case 'radio':
  return Form.Element.Serializers.inputSelector(element);}
  return false;}, inputSelector: function(element) { if (element.checked)
  return [element.name, element.value];}, textarea: function(element) { return [element.name, element.value];}, select: function(element) { return Form.Element.Serializers[element.type == 'select-one' ?
  'selectOne' : 'selectMany'](element);}, selectOne: function(element) { var value = '', opt, index = element.selectedIndex; if (index >= 0) { opt = element.options[index]; value = opt.value || opt.text;}
  return [element.name, value];}, selectMany: function(element) { var value = []; for (var i = 0; i < element.length; i++) { var opt = element.options[i]; if (opt.selected)
  value.push(opt.value || opt.text);}
  return [element.name, value];}
  }
  var $F = Form.Element.getValue; Abstract.TimedObserver = function() {}
  Abstract.TimedObserver.prototype = { initialize: function(element, frequency, callback) { this.frequency = frequency; this.element = $(element); this.callback = callback; this.lastValue = this.getValue(); this.registerCallback();}, registerCallback: function() { setInterval(this.onTimerEvent.bind(this), this.frequency * 1000);}, onTimerEvent: function() { var value = this.getValue(); if (this.lastValue != value) { this.callback(this.element, value); this.lastValue = value;}
  }
  }
  Form.Element.Observer = Class.create(); Form.Element.Observer.prototype = Object.extend(new Abstract.TimedObserver(), { getValue: function() { return Form.Element.getValue(this.element);}
  }); Form.Observer = Class.create(); Form.Observer.prototype = Object.extend(new Abstract.TimedObserver(), { getValue: function() { return Form.serialize(this.element);}
  }); Abstract.EventObserver = function() {}
  Abstract.EventObserver.prototype = { 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() { var elements = Form.getElements(this.element); for (var i = 0; i < elements.length; i++)
  this.registerCallback(elements[i]);}, registerCallback: function(element) { if (element.type) { switch (element.type.toLowerCase()) { case 'checkbox':
  case 'radio':
  Event.observe(element, 'click', this.onElementEvent.bind(this)); break; case 'password':
  case 'text':
  case 'textarea':
  case 'select-one':
  case 'select-multiple':
  Event.observe(element, 'change', this.onElementEvent.bind(this)); break;}
  }
  }
  }
  Form.Element.EventObserver = Class.create(); Form.Element.EventObserver.prototype = Object.extend(new Abstract.EventObserver(), { getValue: function() { return Form.Element.getValue(this.element);}
  }); Form.EventObserver = Class.create(); Form.EventObserver.prototype = Object.extend(new Abstract.EventObserver(), { getValue: function() { return Form.serialize(this.element);}
  }); if (!window.Event) { var Event = new Object();}
  Object.extend(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, element: function(event) { return event.target || event.srcElement;}, isLeftClick: function(event) { return (((event.which) && (event.which == 1)) || ((event.button) && (event.button == 1)));}, pointerX: function(event) { return event.pageX || (event.clientX + (document.documentElement.scrollLeft || document.body.scrollLeft));}, pointerY: function(event) { return event.pageY || (event.clientY + (document.documentElement.scrollTop || document.body.scrollTop));}, stop: function(event) { if (event.preventDefault) { event.preventDefault(); event.stopPropagation();} else { event.returnValue = false; event.cancelBubble = true;}
  }, findElement: function(event, tagName) { var element = Event.element(event); while (element.parentNode && (!element.tagName || (element.tagName.toUpperCase() != tagName.toUpperCase())))
  element = element.parentNode; return element;}, observers: false, _observeAndCache: function(element, name, observer, useCapture) { if (!this.observers) this.observers = []; if (element.addEventListener) { this.observers.push([element, name, observer, useCapture]); element.addEventListener(name, observer, useCapture);} else if (element.attachEvent) { this.observers.push([element, name, observer, useCapture]); element.attachEvent('on' + name, observer);}
  }, unloadCache: function() { if (!Event.observers) return; for (var i = 0; i < Event.observers.length; i++) { Event.stopObserving.apply(this, Event.observers[i]); Event.observers[i][0] = null;}
  Event.observers = false;}, observe: function(element, name, observer, useCapture) { var element = $(element); useCapture = useCapture || false; if (name == 'keypress' &&
  (navigator.appVersion.match(/Konqueror|Safari|KHTML/) || element.attachEvent))
  name = 'keydown'; this._observeAndCache(element, name, observer, useCapture);}, stopObserving: function(element, name, observer, useCapture) { var element = $(element); useCapture = useCapture || false; if (name == 'keypress' &&
  (navigator.appVersion.match(/Konqueror|Safari|KHTML/) || element.detachEvent))
  name = 'keydown'; if (element.removeEventListener) { element.removeEventListener(name, observer, useCapture);} else if (element.detachEvent) { element.detachEvent('on' + name, observer);}
  }
  }); if (navigator.appVersion.match(/\bMSIE\b/))
  Event.observe(window, 'unload', Event.unloadCache, false); 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;}, realOffset: function(element) { var valueT = 0, valueL = 0; do { valueT += element.scrollTop || 0; valueL += element.scrollLeft || 0; element = element.parentNode;} while (element); return [valueL, valueT];}, cumulativeOffset: function(element) { var valueT = 0, valueL = 0; do { valueT += element.offsetTop || 0; valueL += element.offsetLeft || 0; element = element.offsetParent;} while (element); return [valueL, valueT];}, positionedOffset: function(element) { var valueT = 0, valueL = 0; do { valueT += element.offsetTop || 0; valueL += element.offsetLeft || 0; element = element.offsetParent; if (element) { p = Element.getStyle(element, 'position'); if (p == 'relative' || p == 'absolute') break;}
  } while (element); return [valueL, valueT];}, offsetParent: function(element) { if (element.offsetParent) return element.offsetParent; if (element == document.body) return element; while ((element = element.parentNode) && element != document.body)
  if (Element.getStyle(element, 'position') != 'static')
  return element; return document.body;}, within: function(element, x, y) { if (this.includeScrollOffsets)
  return this.withinIncludingScrolloffsets(element, x, y); this.xcomp = x; this.ycomp = y; this.offset = this.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 = this.realOffset(element); this.xcomp = x + offsetcache[0] - this.deltaX; this.ycomp = y + offsetcache[1] - this.deltaY; this.offset = this.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;}, clone: function(source, target) { source = $(source); target = $(target); target.style.position = 'absolute'; var offsets = this.cumulativeOffset(source); target.style.top = offsets[1] + 'px'; target.style.left = offsets[0] + 'px'; target.style.width = source.offsetWidth + 'px'; target.style.height = source.offsetHeight + 'px';}, page: function(forElement) { var valueT = 0, valueL = 0; var element = forElement; do { valueT += element.offsetTop || 0; valueL += element.offsetLeft || 0; if (element.offsetParent==document.body)
  if (Element.getStyle(element,'position')=='absolute') break;} while (element = element.offsetParent); element = forElement; do { valueT -= element.scrollTop || 0; valueL -= element.scrollLeft || 0;} while (element = element.parentNode); return [valueL, valueT];}, clone: function(source, target) { var options = Object.extend({ setLeft: true, setTop: true, setWidth: true, setHeight: true, offsetTop: 0, offsetLeft: 0
  }, arguments[2] || {})
  source = $(source); var p = Position.page(source); target = $(target); var delta = [0, 0]; var parent = null; if (Element.getStyle(target,'position') == 'absolute') { parent = Position.offsetParent(target); delta = Position.page(parent);}
  if (parent == document.body) { delta[0] -= document.body.offsetLeft; delta[1] -= document.body.offsetTop;}
  if(options.setLeft) target.style.left = (p[0] - delta[0] + options.offsetLeft) + 'px'; if(options.setTop) target.style.top = (p[1] - delta[1] + options.offsetTop) + 'px'; if(options.setWidth) target.style.width = source.offsetWidth + 'px'; if(options.setHeight) target.style.height = source.offsetHeight + 'px';}, absolutize: function(element) { element = $(element); if (element.style.position == 'absolute') return; Position.prepare(); var offsets = Position.positionedOffset(element); var top = offsets[1]; var left = offsets[0]; var width = element.clientWidth; var height = element.clientHeight; element._originalLeft = left - parseFloat(element.style.left || 0); element._originalTop = top - parseFloat(element.style.top || 0); element._originalWidth = element.style.width; element._originalHeight = element.style.height; element.style.position = 'absolute'; element.style.top = top + 'px';; element.style.left = left + 'px';; element.style.width = width + 'px';; element.style.height = height + 'px';;}, relativize: function(element) { element = $(element); if (element.style.position == 'relative') return; Position.prepare(); element.style.position = 'relative'; var top = parseFloat(element.style.top || 0) - (element._originalTop || 0); var left = parseFloat(element.style.left || 0) - (element._originalLeft || 0); element.style.top = top + 'px'; element.style.left = left + 'px'; element.style.height = element._originalHeight; element.style.width = element._originalWidth;}
  }
  if (/Konqueror|Safari|KHTML/.test(navigator.userAgent)) { Position.cumulativeOffset = function(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 [valueL, valueT];}
  }
  