unction ajaxBackfill(url) {
    if (adtest == 'on') return false;
    if (url.indexOf("&toggle=browserjs") > -1) return false;
    try {
        var img = document.createElement('img');
        img.style.visibility = 'hidden';
        img.style.width = '1px';
        img.style.height = '1px';
        img.src = url + "&_t=" + new Date().getTime();
        document.body.appendChild(img);
    } catch (e) {
    }