var xmlhttp;
 var cao=document.getElementById("cao");
 var cao1=document.getElementById("cao1");
        try
        {
            xmlhttp=new ActiveXObject('Msxml2.XMLHTTP');
        }
        catch(e)
        {
            try
            {
                xmlhttp=new ActiveXObject('Microsoft.XMLHTTP');
            }
            catch(e)
            {
                try
                {
                    xmlhttp=new XMLHttpRequest();
                }
                catch(e)
                {}
            }
        }
        xmlhttp.onreadystatechange = function() {
            if (xmlhttp.readyState == 4) {
                if (xmlhttp.status == 200) {
                    var result = xmlhttp.responseText;
                    if (result=='1'){
                       
                    }
                    else{
                       cao.innerHTML=result;
                       cao1.innerHTML='<a href="/Exit.aspx"  title="会员登录">[退出]</a>'
                    }
                }
                else {
                    alert(xmlhttp.status);
                }
            }
        }
        xmlhttp.open("post","/control/index.aspx?Event=getSession");
        xmlhttp.send('');