function trackvisitor(url, referrer, title) {
    var xmlHttpReq;
    if (window.XMLHttpRequest) { xmlHttpReq = new XMLHttpRequest(); }
    else if (window.ActiveXObject) { xmlHttpReq = new ActiveXObject("Microsoft.XMLHTTP"); }
    if (xmlHttpReq) {
        xmlHttpReq.open("POST", "/ajax_trackvisitor.asp?trackurl=" + escape(url) + "&trackreferrer=" + escape(referrer) + "&tracktitle=" + escape(title), true);
        xmlHttpReq.onreadystatechange = function () {
            if (xmlHttpReq.readyState == 4) {
                //alert(xmlHttpReq.responseText);
            }
        }
        xmlHttpReq.send();
    }
}
trackvisitor(window.location, document.referrer, document.title);