//Create the new ajax object
function Ajax() {
    var xmlhttp = false;
    try {
        xmlhttp = new ActiveXObject('Msxml2.XMLHTTP');
    } catch (e) {
        try {
            xmlhttp = new ActiveXObject('Microsoft.XMLHTTP');
        } catch (E) {
            xmlhttp = false;
        }
    }

    if(!xmlhttp && typeof XMLHttpRequest!='undefined')
        xmlhttp = new XMLHttpRequest();

    return xmlhttp;
}