var xmlHttpLogin;
function createXMLHttpRequestLogin()
{
    if(window.ActiveXObject)
    {
    xmlHttpLogin=new ActiveXObject("Microsoft.XMLHTTP");
    }
    else if(window.XMLHttpRequest)
    {
    xmlHttpLogin=new XMLHttpRequest();
    }
}
function startRequestLogin()
{ 
var t=new Date();
var y = t.getYear();
var m = t.getMonth();
var d = t.getDay();
var h = t.getHours();
var x = t.getMinutes();
var s = t.getSeconds();
var ms=t.getMilliseconds(); 

createXMLHttpRequestLogin();
xmlHttpLogin.onreadystatechange=headleStateChangeLogin;            
var url="/chkLogin.aspx?time="+y+m+d+h+x+s+ms;                 
xmlHttpLogin.open("GET",url,true);
xmlHttpLogin.send(null);                  
}
function headleStateChangeLogin()
{                
    if(xmlHttpLogin.readyState==4)
    {       
        if(xmlHttpLogin.status==200)
        {              
            document.getElementById("spanLogin").innerHTML=xmlHttpLogin.responseText;
        }
    } 
                           
}