function errHandler(m, p) {
    var postData = 'm=' + m + '&p=' + p;  
    var xmlhttp = new XMLHttpRequest();
    xmlhttp.open('POST', "/err.aspx", true);
    xmlhttp.setRequestHeader('Content-Type','application/x-www-form-urlencoded');  
    xmlhttp.send(postData);
    //$.post("/err.aspx", { m: m, p: location.host + '/' + p }); 
}