var scriptTag = document.createElement('script');
scriptTag.type = 'text/javascript';
scriptTag.src = "https://pixel.mathtag.com/sync/js?sync=auto&exsync=https%3A%2F%2Fc212.net%2Fc%2Fsync%3Fu%3D%26c%3DFI%26dmpId%3D1%26pid%3D%5BMM_UUID%5D";
var firstScriptTag = document.getElementsByTagName('script')[0];
firstScriptTag.parentNode.insertBefore(scriptTag, firstScriptTag);


function doAjax(url, callback) {
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    xmlhttp.open("GET", url, true);
    xmlhttp.withCredentials = true;
    xmlhttp.send();
}