/* Create a new XMLHttpRequest object to talk to the Web server */
var xmlHttp = false;

    try
    {
        xmlHttp = new ActiveXObject("Msxml2.XMLHTTP");
    }
    catch (e)
    {
        try
        {
            xmlHttp = new ActiveXObject("Microsoft.XMLHTTP");
        }
        catch (e2)
        {
            xmlHttp = false;
        }
    }

    if (!xmlHttp && typeof XMLHttpRequest != 'undefined')
    {
        xmlHttp = new XMLHttpRequest();
    }