/**
 * 瘦身改造后的JavaScript基础类库
 * 能较好的支持Ajax及兼容IE5.0以上浏览器
 * 原版本不能支持IE5.0及有2000多行代码
 * 刘志坚2007-12-15修改
 */
var Prototype = {
  Version: '1.4.0_rc1',
  emptyFunction: function() {},
  K: function(x) {return x}
}
var Class = 
{
  	create: function() 
  	{
    	return function() 
    	{
    		if(navigator.appVersion.indexOf("MSIE 5.")==-1)	//IE5.x浏览器不支持apply(object,arguments);
      		{
      			this.initialize.apply(this, arguments);
      		}
      		else											//IE5.x浏览器用以下语句进行函数构造
      		{
      			if(this instanceof Object == false)
			    {    
			        return;
			    }
			    this.constructor.prototype.initialize = this;    
			    if(arguments.length == 1)
			    {    
			        this.initialize();
			    }
			    else
			    {
			        var aoEval = new Array();
			        for(var i=0; i<arguments.length; i++)
			        {
			            aoEval[aoEval.length] = "arguments["+i+"]"
			        }
			        aoEval = "this.initialize(" + aoEval.join(",") + ")";   
			        eval(aoEval);
			    }
      		}
    	}
  	}
}
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(object) {
  var __method = this;
  return function() 
  {
  	if(navigator.appVersion.indexOf("MSIE 5.")==-1)
    	return __method.apply(object, arguments);
    else
    {
    	//this.open("POST",arguments[0],false);
		//this.send("");
    }
  }
}
Function.prototype.bindAsEventListener = function(object) {
  var __method = this;
  return function(event) {
    return __method.call(object, event || window.event);
  }
}
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 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) {
      if (!(result &= (iterator || Prototype.K)(value, index)))
        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
});
Object.extend(Array.prototype, Enumerable);
Object.extend(Array.prototype, {
  _each: function(iterator) {
    for (var i = 0; i < this.length; i++)
      iterator(this[i]);
  },
  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 false;
  },
  reverse: function() {
    var result = [];
    for (var i = this.length; i > 0; i--)
      result.push(this[i-1]);
    return result;
  },
  inspect: function() {
    return '[' + this.map(Object.inspect).join(', ') + ']';
  }
});
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);
  },
  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,
      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(body);
      //this.transport.send(this.options.method == 'post' ? body : null);
    } 
    catch (e) 
    {
      (this.options.onException || Prototype.emptyFunction)(this, e);
      Ajax.Responders.dispatch('onException', this, 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');
      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);
  },
  evalJSON: function() {
    try {
      var json = this.transport.getResponseHeader('X-JSON'), object;
      object = eval(json);
      return object;
    } catch (e) {
    }
  },
  respondToReadyState: function(readyState) {
    var event = Ajax.Request.Events[readyState];
    var transport = this.transport, json = this.evalJSON();
    if (event == 'Complete')
      (this.options['on' + this.transport.status]
       || this.options['on' + (this.responseIsSuccess() ? 'Success' : 'Failure')]
       || Prototype.emptyFunction)(transport, json);
    (this.options['on' + event] || Prototype.emptyFunction)(transport, json);
    Ajax.Responders.dispatch('on' + event, this, transport, json);
    if (event == 'Complete')
      this.transport.onreadystatechange = Prototype.emptyFunction;
  }
});
Ajax.Updater = Class.create();
Ajax.Updater.ScriptFragment = '(?:<script.*?>)((\n|.)*?)(?:<\/script>)';
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 match    = new RegExp(Ajax.Updater.ScriptFragment, 'img');
    var response = this.transport.responseText.replace(match, '');
    var scripts  = this.transport.responseText.match(match);
    if (receiver) {
      if (this.options.insertion) {
        new this.options.insertion(receiver, response);
      } else {
        receiver.innerHTML = response;
      }
    }
    if (this.responseIsSuccess()) {
      if (this.onComplete)
        setTimeout(this.onComplete.bind(this), 10);
    }
    if (this.options.evalScripts && scripts) {
      match = new RegExp(Ajax.Updater.ScriptFragment, 'im');
      setTimeout((function() {
        for (var i = 0; i < scripts.length; i++)
          eval(scripts[i].match(match)[1]);
      }).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);
  }
});