function mob_ad (agent, ip, div)
{   var url = '/mobad.asp?site_id=166&cat=22&u=' + agent + '&i=' + ip;
    var xmlhttp=new XMLHttpRequest();
    xmlhttp.open("GET", url);
    xmlhttp.onreadystatechange = function() {
        if (xmlhttp.readyState == 4 && xmlhttp.status == 200) {
            document.getElementById(div).innerHTML = xmlhttp.responseText;
        }
    }
    xmlhttp.send(null);
}