function getInfo(url)
{
	if (window.XMLHttpRequest) 
	{
		req=new XMLHttpRequest();
	}
	else if (window.ActiveXObject)
	{
		req=new ActiveXObject("Microsoft.XMLHTTP");
	}
	if(req)
	{
		req.open("GET",url,true);
		var content=document.getElementById("display");
		content.innerHTML="<table><tr><td><img src=/images/loading.gif align=absmiddle>    正在读取数据.....</td></tr></table>";
		req.onreadystatechange=callback;
		req.send(null);
	}
}
function callback()
{
	if(req.readyState==4)
	{
		if(req.status==200)
		{
			parseMessage();
		}
		else {alert("操作失败");}
	}
	else
	{
	}
}
function parseMessage()
{
	var content=document.getElementById("display");
	content.innerHTML=req.responseText;
}