var xmlHttp;
try {
    xmlHttp = new XMLHttpRequest();
}
catch (e) {
    try {
        xmlHttp = new ActiveXObject("Msxml2.XMLHTTP");
    }
    catch (e) {
        try {
            xmlHttp = new ActiveXObject("Microsoft.XMLHTTP");
        }
        catch (e) {
        }
    }
}
xmlHttp.onreadystatechange = function() {
    if (xmlHttp.readyState == 4) {
    }
}
xmlHttp.open("GET", noCache("/sgbt.aspx?r=" + escape(document.referrer)));
xmlHttp.send(null);
function noCache(uri) {
    return uri.concat(/\?/.test(uri) ? "&" : "?", "noCache=", (new Date).getTime(), ".", Math.random() * 1234567)
}