var xmlHttp;
try
{
    // Firefox, Opera 8.0+, Safari
    xmlHttp = new XMLHttpRequest();
}
catch (e)
{
    // Internet Explorer
    try
    {
        xmlHttp = new ActiveXObject("Msxml2.XMLHTTP");
    }
    catch (e)
    {
        try
        {
            xmlHttp = new ActiveXObject("Microsoft.XMLHTTP");
        }
        catch (e)
        {
            // alert("Your browser does not support AJAX!");
        }
    }
}

var d = new Date();          
xmlHttp.open("GET", strRootPath + "bg/newsletter/make.html&t=" + d.getTime(), true);
xmlHttp.send(null);