function AjaxLib(){
	/**//**
	成员变量
	*/
	this.XMLHttpReq = null;			//XML对象
	this.method = "post";			//执行的方法(post/get)
	this.url = "";				//异步调用的页面地址
	this.text = "";				//异步返回的响应字符串
	this.responseBody = "";			//异步返回的响应boc
	this.failed = false;			//创建对象错误标志
	
	/**//**
	事件区
	*/
	this.onLoading = function() {};		//正在发送请求
	this.onLoaded = function() {};		//已经接收到全部响应内容
	this.onInteractive = function() {};	//正在解析响应内容
	this.onCompletion = function() {};	//响应内容解析完成
	this.onError = function() {};		//异步错误处理事件
	this.onFail = function() {};		//创建对象失败处理世界
	
	/**//**
	重置所有事件函数
	*/
	this.resetFunctions = function() {
		this.onLoading = function() {};
		this.onLoaded = function() {};
		this.onInteractive = function() {};
		this.onCompletion = function() {};
		this.onError = function() {};
		this.onFail = function() {};
	};
 
	/**//**
	初始化函数(构造时自动初始化)
	*/
	this.init = function(){
		if(window.XMLHttpRequest){
			this.XMLHttpReq = new XMLHttpRequest();
		}else if (window.ActiveXObject){
			try{this.XMLHttpReq = new ActiveXObject("Msxml4.XMLHTTP");}
			catch(e){
				try{this.XMLHttpReq = new ActiveXObject("Msxml3.XMLHTTP");}
				catch(e){
					try{this.XMLHttpReq = new ActiveXObject("Msxml2.XMLHTTP");}
					catch(e){
						try{this.XMLHttpReq = new ActiveXObject("Microsoft.XMLHTTP");}
						catch(oc){this.failed=true;}
					}
				}
			}
		}
	};
	
	/**//**
	发送请求函数
	@param data 发送的数据
	@example send("id=1");
	*/
	this.send=function(data){
		var self=this;
		if(this.method=="post") {
			this.XMLHttpReq.open(self.method,self.url,true);
		}else{
			this.XMLHttpReq.open(self.method,self.url+"?"+encodeURI(data),true);
		}
		//添加消息响应头
		this.XMLHttpReq.setRequestHeader("Content-Type","application/x-www-form-urlencoded;charset=gb2312");
		
		//异步回调函数
		this.XMLHttpReq.onreadystatechange = function(){
			//对象未创建
			if (self.failed) {
				self.onFail();
				return;
			}
			
			//消息响应标志
			switch (self.XMLHttpReq.readyState) {
				case 1:{
					self.onLoading();
					break;
				}
				case 2:{
					self.onLoaded();
					break;
				}
				case 3:{
					self.onInteractive();
					break;
				}
				case 4:{
					self.text = self.XMLHttpReq.responseText;
					self.responseXML = self.XMLHttpReq.responseXML;
					self.onCompletion();
					break;
				}
			}
		};
		
		
		if(this.method=="post"){
			this.XMLHttpReq.send(data);	//发送请求
		}else{
			this.XMLHttpReq.send();		//发送请求
		}
	};
	
	this.abort=function(){
		this.XMLHttpReq.abort();
	}
	
	this.close=function(){
		this.XMLHttpReq=null;
	}
	this.init();
}