ajax注册应用三_ASP

我们来看最后一个js 文件

var Prototype = {
Version: '1.4.0',
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 (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;
      }
    }
}
}

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

function $() {
var elements = new Array();

for (var i = 0; i < arguments.length; i ) {
    var element = arguments[i];
    if (typeof element == 'string')
      element = document.getElementById(element);

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

elements.push(element);
}

return elements;
}
Object.extend(String.prototype, {
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(eval);
},

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('\\', '\\\\').replace("'", '\\\'') "'";
}
});

String.prototype.parseQuery = String.prototype.toQueryParams;

var $break = new Object();
var $continue = new Object();

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 (value >= (result || value))
        result = value;
    });
    return result;
},

min: function(iterator) {
    var result;
    this.each(function(value, index) {
      value = (iterator || Prototype.K)(value, index);
      if (value <= (result || value))
        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) {
      iterator(value = collections.pluck(index));
      return value;
    });
},

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);

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.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();
},

shift: function() {
    var result = this[0];
    for (var i = 0; i < this.length - 1; i )
      this[i] = this[i 1];
    this.length--;
    return result;
},

inspect: function() {
    return '[' this.map(Object.inspect).join(', ') ']';
}
});
var Hash = {
_each: function(iterator) {
    for (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(', ') '}>';
}
}

_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 ActiveXObject('Msxml2.XMLHTTP')},
      function() {return new ActiveXObject('Microsoft.XMLHTTP')},
      function() {return new XMLHttpRequest()}
    ) || false;
},

activeRequestCount: 0
}

Ajax.Responders = {
responders: [],

_each: function(iterator) {
this.responders._each(iterator);
},

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,
      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];

    if (this.options.method == 'post') {
      requestHeaders.push('Content-type',
        'application/x-www-form-urlencoded');

      /* 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);
}
});
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(child);
    return elements;
});
}

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

if (!window.Element) {
var Element = new Object();
}

Object.extend(Element, {
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);
},

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 $(element).innerHTML.match(/^\s*$/);
},

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 (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;
}
});

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) {
        if (this.element.tagName.toLowerCase() == 'tbody') {
          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 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 (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;
      if (!value && !('value' in opt))
        value = opt.text;
    }
    return [element.name, value];
},

selectMany: function(element) {
    var value = new Array();
    for (var i = 0; i < element.length; i ) {
      var opt = element.options[i];
      if (opt.selected) {
        var optValue = opt.value;
        if (!optValue && !('value' in opt))
          optValue = opt.text;
        value.push(optValue);
      }
    }
    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;
    }
},

// find the first node with the given tagName, starting from the
// node the event was triggered on; traverses the DOM upwards
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.stopObservi

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