javascript 怎么调用C#后台的有参方法?

[wangdingbang]

急用，要能够切实可行的解决方案，不要网上粘的。谢谢啦！

[挨踢直男]

var ajax = {//xmlhttp request
		tryList:function(){
			var xhr = null;
			for(var i=0;i<arguments.length;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("你的aspx文件的址，在page_load里调用那个函数","",true,function(xhr){},"没有返回内容");