function CompareIp(info)
{ 
    
    if(info == 1)
    {
        alert("学习账号同一时刻只允许一人在线学习！");
        location.href="/EduPlatform/eduinfo/login.aspx";
    }
    if(info == 2)
    {
       // alert("本次登录超时，请重新登录！");
        //location.href="/EduPlatform/eduinfo/login.aspx";
    }
}
var Request = new Object();

Request.send = function(url, method, callback, data, urlencoded)
{
	var req;
	if (window.XMLHttpRequest)
	{
		req = new XMLHttpRequest();
	} else if (window.ActiveXObject) 
	{
	req = new ActiveXObject("Microsoft.XMLHTTP");
	}
	req.onreadystatechange = function() 
	{
		if (req.readyState == 4) {
			if (req.status < 400) {
				(method=="POST") ? callback(req,data) :callback(req) ;
			} else {				
				
			}
		}
	}
	if (method=="POST") {
		req.open("POST", url, true);
		if (urlencoded) req.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
		req.send(data);
	} else {
		req.open("GET", url, true);
		req.send(null);
	}

	return req;
}

Request.sendPOST = function(url, data, callback) 
{
	Request.send(url, "POST", callback, data, true);
}

Request.sendGET = function(url, callback, args) 
{
	return Request.send(url, "GET", callback, args);
}

function DoLoadMenu()
{
	Request.sendPOST("/EduPlatform/eduinfo/single.aspx",null,ViewResponse);
}
		   
function ViewResponse(response) 
{
    CompareIp(response.responseText);
}
function single()
{
	DoLoadMenu();
	window.setInterval(DoLoadMenu,8000);
}
function doload()
{
	DoLoadMenu();
	window.setInterval(DoLoadMenu,8000);
}