Ajax载入HTML文档为什么换成POST方式就不行呢

var ajax = {//xmlhttp request

		tryList:function(){

			var xhr = null;

			for(var i=0;i
				var lambda = arguments[i];

				try{xhr = lambda();break;}catch(e){}

			}

			return xhr;

		},

		init:function(){

			return this.tryList(

				function(){return new ActiveXObject('MSXML2.XMLHttp.6.0');},

				function(){return new ActiveXObject('MSXML2.XMLHttp.3.0');},

				function(){return new XMLHttpRequest();},

				function(){return new ActiveXObject('MSXML2.XMLHttp.5.0');},

				function(){return new ActiveXObject('MSXML2.XMLHttp.4.0');},

				function(){return new ActiveXObject('Msxml2.XMLHTTP');},

				function(){return new ActiveXObject('MSXML.XMLHttp');},

				function(){return new ActiveXObject('Microsoft.XMLHTTP');}

				) || null;

		},

		post:function(sUrl,sArgs,bAsync,fCallBack,errmsg){

			var xhr = this.init();

			xhr.onreadystatechange = function(){

				if(xhr.readyState == 4){

					if(xhr.responseText){

						if(fCallBack.cOnstructor==Function){fCallBack(xhr);}

					}else{

						alert(errmsg);

					}

				}

			};

			xhr.open('POST',encodeURI(sUrl),bAsync);

			xhr.setRequestHeader('Content-Length',sArgs.length);

			xhr.setRequestHeader('Content-Type','application/x-www-form-urlencoded');

			xhr.send(sArgs);

		},

		get:function(sUrl,bAsync,fCallBack,errmsg){

			var xhr = this.init();

			xhr.onreadystatechange = function(){

				if(xhr.readyState == 4){

					if(xhr.responseText){

						if(fCallBack.cOnstructor==Function){fCallBack(xhr);}

					}else{

						alert(errmsg);

					}

				}

			};

			xhr.open('GET',encodeURI(sUrl),bAsync);

			xhr.send('Null');

		}

	}



ajax.post("地址","参数[name=value&name=value]",true,function(xhr){alert(xhr.responseText);//回调函数},"错误提示字符串");

 if(xmlHttpReq!= null){        //如果对象实例化成功 

        //var url = "9-2.html?r="&r=" + Math.random();

        xmlHttpReq.anscy=false;//好像是anscy 不大记得了

        xmlHttpReq.open("POST","9-2.html?t="+ new Date().getTime());         xmlHttpReq.setRequestHeader("Content-Type","application/x-www-form-urlencoded"); 

        xmlHttpReq.Onreadystatechange=RequestCallBack; //设置回调函数

    

        xmlHttpReq.send(null);    //因为使用get方式提交，所以可以使用null参调用

    }