function getHTTPObject() {
    var xmlhttp;
    try {
        xmlhttp = new ActiveXObject("Msxml2.XMLHTTP");
    } catch (e) {
    try {
        xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
    } catch (E) {
        xmlhttp = false;
        }
    }
    if (!xmlhttp && typeof XMLHttpRequest != 'undefined') {
        try {
            xmlhttp = new XMLHttpRequest();
        } catch (e) {
            xmlhttp = false;
        }
    }
    return xmlhttp;
}

var http = getHTTPObject(); // We create the HTTP Object

// js
function removeClique(adv_id) {
    http.open("GET", "../_advertising//ajax.clique.php?adv_id=" + escape(adv_id), true);
    http.send(null);
}