function DedeAjax(WiteOKFunc){ //WiteOKFunc 为异步状态事件处理函数 
	//xmlhttp和xmldom对象
	this.xhttp = null;
	this.xdom = null;

	//post或get发送数据的键值对
	this.keys = Array();
	this.values = Array();
	this.keyCount = -1;

	//http请求头
	this.rkeys = Array();
	this.rvalues = Array();
	this.rkeyCount = -1;
	//请求头类型
	this.rtype = 'text';

	//初始化xmlhttp
	if(window.XMLHttpRequest){//IE7, Mozilla ,Firefox 等浏览器内置该对象
		this.xhttp = new XMLHttpRequest();
	}else if(window.ActiveXObject){//IE6、IE5
		try { this.xhttp = new ActiveXObject("Msxml2.XMLHTTP");} catch (e) { }
		if (this.xhttp == null) try { this.xhttp = new ActiveXObject("Microsoft.XMLHTTP");} catch (e) { }
	}
	
	this.xhttp.onreadystatechange = WiteOKFunc;
	//rs: responseBody、responseStream、responseXml、responseText

	//以下为成员函数
	//--------------------------------
	//初始化xmldom
	this.InitXDom = function(){
		 var obj = null;
		 if (typeof(DOMParser) != "undefined") { // Gecko、Mozilla、Firefox
		   var parser = new DOMParser();
		   obj = parser.parseFromString(xmlText, "text/xml");
		 } else { // IE
		   try { obj = new ActiveXObject("MSXML2.DOMDocument");} catch (e) { }
		   if (obj == null) try { obj = new ActiveXObject("Microsoft.XMLDOM"); } catch (e) { }
		 }
		 this.xdom = obj;
	};
	//增加一个POST或GET键值对
	this.AddKey = function(skey,svalue){
		this.keyCount++;
		this.keys[this.keyCount] = skey;
		this.values[this.keyCount] = escape(svalue);
	};

	//增加一个Http请求头键值对
	this.AddHead = function(skey,svalue){
		this.rkeyCount++;
		this.rkeys[this.rkeyCount] = skey;
		this.rvalues[this.rkeyCount] = svalue;
	};

	//清除当前对象的哈希表参数
	this.ClearSet = function(){
		this.keyCount = -1;
		this.keys = Array();
		this.values = Array();
		this.rkeyCount = -1;
		this.rkeys = Array();
		this.rvalues = Array();
	};

	//发送http请求头
	this.SendHead = function(){
		if(this.rkeyCount!=-1){ //发送用户自行设定的请求头
		  for(;i<=this.rkeyCount;i++){
		   this.xhttp.setRequestHeader(this.rkeys[i],this.rvalues[i]); 
		  }
		 }
		　if(this.rtype=='binary'){
		  this.xhttp.setRequestHeader("Content-Type","multipart/form-data");
		 }else{
		  this.xhttp.setRequestHeader("Content-Type","application/x-www-form-urlencoded");
		 }
	};

	//用Post方式发送数据
	this.SendPost = function(purl){
		var pdata = "";
		var i=0;
		this.state = 0;
		this.xhttp.open("POST", purl, true); 
		this.SendHead();
		 if(this.keyCount!=-1){ //post数据
		  for(;i<=this.keyCount;i++){
		   if(pdata=="") pdata = this.keys[i]+'='+this.values[i];
		   else pdata += "&"+this.keys[i]+'='+this.values[i];
		  }
		 }
		 this.xhttp.send(pdata);
	};

	//用GET方式发送数据
	this.SendGet = function(purl){
		var gkey = "";
		var i=0;
		this.state = 0;
		if(this.keyCount!=-1){ //get参数
		  for(;i<=this.keyCount;i++){
		   if(gkey=="") gkey = this.keys[i]+'='+this.values[i];
		   else gkey += "&"+this.keys[i]+'='+this.values[i];
		  }
		  if(purl.indexOf('?')==-1) purl = purl + '?' + gkey;
		  else  purl = purl + '&' + gkey;
		 }
		this.xhttp.open("GET", purl, true); 
		this.SendHead();
		 this.xhttp.send();
	};
} // End Class DedeAjax