function AjaxConn() {
    var h = false;
    var e;
    try {
        h = new ActiveXObject("Msxml2.XMLHTTP"); 
    }
    catch (e) {
        try { 
            h=new ActiveXObject("Microsoft.XMLHTTP");
        }
        catch(e) { 
            h=false; 
        }
    }
    if((! h) && (typeof XMLHttpRequest != 'undefined')) {
        h = new XMLHttpRequest();
    }
    return h;
};