ValidateSession(); function ValidateSession() { var a; if (window.XMLHttpRequest) { a = new XMLHttpRequest() } else if (window.ActiveXObject) { a = new ActiveXObject("Microsoft.XMLHTTP") } else { } a.onreadystatechange = function () { if (a.readyState == 4) { var e = a.responseText } }; a.open("GET", "/stat-interface.aspx?func=validate&date=" + (new Date()).getTime() + "&res=" + screen.width + "x" + screen.height, true); a.send(null); }