// JavaScript Document
var ajax,RequestData;
function CreateRequest()
{
   try
   {
	 if(window.Msxml2.XMLHTTP)
	   ajax=new ActiveXObject("Msxml2.XMLHTTP");
	 else
	   ajax=new XMLHttpRequest();
   }
   catch(trymicrosoft)
   {
	   try
	   {
		   ajax=new ActiveXObject("Msxml2.XMLHTTP");
	   }
       catch(othermicrosoft)
       {
		   try
	       {
		 	  ajax=new ActiveXObject("Microsoft.XMLHTTP");
		   }
           catch(failed)
           {
			   ajax=new XMLHttpRequest();
		    }
        }
    }
}

function getRequestData(url)
{
   CreateRequest();
   ajax.open("GET",url,false);
   ajax.onReadyStateChange=updatePage;
   ajax.send(null);
   if(navigator.userAgent.indexOf("Firefox")>0)
   {
       RequestData=ajax.responseText;
   }
   return RequestData;
}

function updatePage()
{
	if(ajax.readyState==4)
    {
       if(ajax.status==200)
	   {
           RequestData=ajax.responseText
       }
       else
       {
		   RequestData="服务器请求失败";
		   alert("服务器请求失败！");
	   }
    }
}