ajax无法获取回调值
各位大神，俺的AJAX上传文件可以上传，但无法获取回调值，请帮忙看看。

用FF查看错误，提示为：missing ) in parentetical

代码如下：

(function(){

	function addEvent( node,type,listener) {

    if (node.addEventListener) {

     

        node.addEventListener( type, listener, false );

        return true;

    } else if(node.attachEvent) {

        

        node['e'+type+listener] = listener;

        node[type+listener] = function(){node['e'+type+listener]( window.event );}

        node.attachEvent( 'on'+type, node[type+listener] );

        return true;

    }

    

    return false;

	};

	var submit=document.forms["myform"];

	addEvent(submit,'submit',startUpload);

	var begin;

	var request;

	var rdm;

	var pec=document.getElementById("pecent");

	function startUpload()

	{

	    rdm=Math.floor(Math.random()*100000000);

		document.getElementById('remark').setAttribute('value',rdm);

		document.getElementById("progress").style['display']='block';

		//creatXmlHttpRequest();

		begin=setTimeout(doRequest,1000);

	};

	function creatXmlHttpRequest()

	{

	    if(window.ActiveXObject)

	    {request=new ActiveXObject("Microsoft.XMLHTTP")}

	    else{request=new XMLHttpRequest();}

	};

	var count=0;

	function doRequest()

   {

   	   if(window.ActiveXObject)

	    {request=new ActiveXObject("Microsoft.XMLHTTP");}

	    else{request=new XMLHttpRequest();}



   	   if(request!=null){

       request.onreadystatechange=handle;

       request.open("GET","upload.php?key="+rdm+"&sim=" + (++count),true);

       request.send();

       }

   };

		function handle(){

			if(request.readyState==4&&request.status==200)

			{

				//接受服务器数据

				var pec=document.getElementById("pecent");

				var prgs=eval("(" +request.responseText + ")");

				var prgs=request.responseText;

				var cur=parseInt(prgs.current);

				var total=parseInt(prgs.total);

				var pecentIs=Math.round(cur/total*100);

				pec.innerHTML=pecentIs.toString()+"%";

				if(100==pecentIs)

				{

				document.getElementById("rst").innerHTML="上传成功";

					pec.style['width']="200px";

					clearTimeout(begin);

					

				}else{

					begin=setTimeout(doRequest,1000);

					alert(pecentIs);

					pec.style['width']=pecentIs*2;

				}

			}

		};

	})();

------解决方案--------------------
var prgs = eval("(" + request.responseText + ")");
var prgs = request.responseText;