(this.options['on' + this.transport.status]         || this.options['on' + (this.success() ? 'Success' : 'Failure')]         || Prototype.emptyFunction)(transport, json);      } catch (e) {        this.dispatchException(e);      }      if ((this.getHeader('Content-type') || 'text/javascript').strip().        match(/^(text|application)\/(x-)?(java|ecma)script(;.*)?$/i))          this.evalResponse();    }    try {      (this.options['on' + state] || Prototype.emptyFunction)(transport, json);      Ajax.Responders.dispatch('on' + state, this, transport, json);    } catch (e) {      this.dispatchException(e);    }    if (state == 'Complete') {      // avoid memory leak in MSIE: clean up      this.transport.onreadystatechange = Prototype.emptyFunction;    }  },  getHeader: function(name) {    try {      return this.transport.getResponseHeader(name);    } catch (e) { return null }  },  evalJSON: function() {    try {      var json = this.getHeader('X-JSON');      return json ? eval('(' + json + ')') : null;    } catch (e) { return null }  },  evalResponse: function() {    try {      return eval(this.transport.responseText);    } catch (e) {      this.dispatchException(e);    }  },  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.container = {      success: (container.success || 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, param) {      this.updateContent();      onComplete(transport, param);    }).bind(this);    this.request(url);  },  updateContent: function() {    var receiver = this.container[this.success() ? 'success' : 'failure'];    var response = this.transport.responseText;    if (!this.options.evalScripts) response = response.stripScripts();    if (receiver = $(receiver)) {      if (this.options.insertion)        new this.options.insertion(receiver, response);      else        receiver.update(response);    }    if (this.success()) {      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.options.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 $(element) {  if (arguments.length > 1) {    for (var i = 0, elements = [], length = arguments.length; i < length; i++)      elements.push($(arguments[i]));    return elements;  }  if (typeof element == 'string')    element = document.getElementById(element);  return Element.extend(element);}if (Prototype.BrowserFeatures.XPath) {  document._getElementsByXPath = function(expression, parentElement) {    var results = [];    var query = document.evaluate(expression, $(parentElement) || document,      null, XPathResult.ORDERED_NODE_SNAPSHOT_TYPE, null);    for (var i = 0, length = query.snapshotLength; i < length; i++)      results.push(query.snapshotItem(i));    return results;  };}document.getElementsByClassName = function(className, parentElement) {  if (Prototype.BrowserFeatures.XPath) {    var q = ".//*[contains(concat(' ', @class, ' '), ' " + className + " ')]";    return document._getElementsByXPath(q, parentElement);  } else {    var children = ($(parentElement) || document.body).getElementsByTagName('*');    var elements = [], child;    for (var i = 0, length = children.length; i < length; i++) {      child = children[i];      if (Element.hasClassName(child, className))        elements.push(Element.extend(child));    }    return elements;  }};/*--------------------------------------------------------------------------*/if (!window.Element)  var Element = new Object();Element.extend = function(element) {  if (!element || _nativeExtensions || element.nodeType == 3) return element;  if (!element._extended && element.tagName && element != window) {    var methods = Object.clone(Element.Methods), cache = Element.extend.cache;    if (element.tagName == 'FORM')      Object.extend(methods, Form.Methods);    if (['INPUT', 'TEXTAREA', 'SELECT'].include(element.tagName))      Object.extend(methods, Form.Element.Methods);    Object.extend(methods, Element.Methods.Simulated);    for (var property in methods) {      var value = methods[property];      if (typeof value == 'function' && !(property in element))        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(element) {    element = $(element);    Element[Element.visible(element) ? 'hide' : 'show'](element);    return element;  },  hide: function(element) {    $(element).style.display = 'none';    return element;  },  show: function(element) {    $(element).style.display = '';    return element;  },  remove: function(element) {    element = $(element);    element.parentNode.removeChild(element);    return element;  },  update: function(element, html) {    html = typeof html == 'undefined' ? '' : html.toString();    $(element).innerHTML = html.stripScripts();    setTimeout(function() {html.evalScripts()}, 10);    return element;  },  replace: function(element, html) {    element = $(element);    html = typeof html == 'undefined' ? '' : html.toString();    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);    return element;  },  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();      var value = (element[property] || '').toString();      if (value) result += ' ' + attribute + '=' + value.inspect(true);    });    return result + '>';  },  recursivelyCollect: function(element, property) {    element = $(element);    var elements = [];    while (element = element[property])      if (element.nodeType == 1)        elements.push(Element.extend(element));    return elements;  },  ancestors: function(element) {    return $(element).recursivelyCollect('parentNode');  },  descendants: function(element) {    return $A($(element).getElementsByTagName('*'));  },  immediateDescendants: function(element) {    if (!(element = $(element).firstChild)) return [];    while (element && element.nodeType != 1) element = element.nextSibling;    if (element) return [element].concat($(element).nextSiblings());    return [];  },  previousSiblings: function(element) {    return $(element).recursivelyCollect('previousSibling');  },  nextSiblings: function(element) {    return $(element).recursivelyCollect('nextSibling');  },  siblings: function(element) {    element = $(element);    return element.previousSiblings().reverse().concat(element.nextSiblings());  },  match: function(element, selector) {    if (typeof selector == 'string')      selector = new Selector(selector);    return selector.match($(element));  },  up: function(element, expression, index) {    return Selector.findElement($(element).ancestors(), expression, index);  },  down: function(element, expression, index) {    return Selector.findElement($(element).descendants(), expression, index);  },  previous: function(element, expression, index) {    return Selector.findElement($(element).previousSiblings(), expression, index);  },  next: function(element, expression, index) {    return Selector.findElement($(element).nextSiblings(), expression, index);  },  getElementsBySelector: function() {    var args = $A(arguments), element = $(args.shift());    return Selector.findChildElements(element, args);  },  getElementsByClassName: function(element, className) {    return document.getElementsByClassName(className, element);  },  readAttribute: function(element, name) {    element = $(element);    if (document.all && !window.opera) {      var t = Element._attributeTranslations;      if (t.values[name]) return t.values[name](element, name);      if (t.names[name])  name = t.names[name];      var attribute = element.attributes[name];      if(attribute) return attribute.nodeValue;    }    return element.getAttribute(name);  },  getHeight: function(element) {    return $(element).getDimensions().height;  },  getWidth: function(element) {    return $(element).getDimensions().width;  },  classNames: function(element) {    return new Element.ClassNames(element);  },  hasClassName: function(element, className) {    if (!(element = $(element))) return;    var elementClassName = element.className;    if (elementClassName.length == 0) return false;    if (elementClassName == className ||        elementClassName.match(new RegExp("(^|\\s)" + className + "(\\s|$)")))      return true;    return false;  },  addClassName: function(element, className) {    if (!(element = $(element))) return;    Element.classNames(element).add(className);    return element;  },  removeClassName: function(element, className) {    if (!(element = $(element))) return;    Element.classNames(element).remove(className);    return element;  },  toggleClassName: function(element, className) {    if (!(element = $(element))) return;    Element.classNames(element)[element.hasClassName(className) ? 'remove' : 'add'](className);    return element;  },  observe: function() {    Event.observe.apply(Event, arguments);    return $A(arguments).first();  },  stopObserving: function() {    Event.stopObserving.apply(Event, arguments);    return $A(arguments).first();  },  // removes whitespace-only text node children  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 $(element).innerHTML.match(/^\s*$/);  },  descendantOf: function(element, ancestor) {    element = $(element), ancestor = $(ancestor);    while (element = element.parentNode)      if (element == ancestor) return true;    return false;  },  scrollTo: function(element) {    element = $(element);    var pos = Position.cumulativeOffset(element);    window.scrollTo(pos[0], pos[1]);    return element;  },  getStyle: function(element, style) {    element = $(element);    if (['float','cssFloat'].include(style))      style = (typeof element.style.styleFloat != 'undefined' ? 'styleFloat' : 'cssFloat');    style = style.camelize();    var value = element.style[style];    if (!value) {      if (document.defaultView && document.defaultView.getComputedStyle) {        var css = document.defaultView.getComputedStyle(element, null);        value = css ? css[style] : null;      } else if (element.currentStyle) {        value = element.currentStyle[style];      }    }    if((value == 'auto') && ['width','height'].include(style) && (element.getStyle('display') != 'none'))      value = element['offset'+style.capitalize()] + 'px';    if (window.opera && ['left', 'top', 'right', 'bottom'].include(style))      if (Element.getStyle(element, 'position') == 'static') value = 'auto';    if(style == 'opacity') {      if(value) return parseFloat(value);      if(value = (element.getStyle('filter') || '').match(/alpha\(opacity=(.*)\)/))        if(value[1]) return parseFloat(value[1]) / 100;      return 1.0;    }    return value == 'auto' ? null : value;  },  setStyle: function(element, style) {    element = $(element);    for (var name in style) {      var value = style[name];      if(name == 'opacity') {        if (value == 1) {          value = (/Gecko/.test(navigator.userAgent) &&            !/Konqueror|Safari|KHTML/.test(navigator.userAgent)) ? 0.999999 : 1.0;          if(/MSIE/.test(navigator.userAgent) && !window.opera)