function createXMLHttp() {
    var http
    /*@cc_on @*/
    /*@if (@_jscript_version >= 5)
    try {
        http=new ActiveXObject("Msxml2.XMLHTTP")
    } catch (e) {
        try {
            http=new ActiveXObject("Microsoft.XMLHTTP")
        } catch (E) {
            http=false
        }
    }
    @else
    http=false
    @end @*/
    if (!http && typeof XMLHttpRequest!='undefined') {
        try {
            http = new XMLHttpRequest();
        } catch (e) {
            http=false
        }
    }
    return http;
}
var xmlhttp = createXMLHttp();