function createXMLHTTP(){
    if (window.XMLHttpRequest){
        oXmlHTTP = new XMLHttpRequest();
        return oXmlHTTP;
    }else if (window.ActiveXObject){
        var versions = ["MSXML2.XMLHttp.6.0","MSXML2.XMLHttp.3.0","MSXML2.XMLHttp","Microsoft.XMLHttp"];
        for (i=0; i < versions.length; i++){
            try{
                oXmlHTTP = new ActiveXObject(versions[i]);
                return oXmlHTTP;
            }catch (err){
                //nothing
            }
        }
    }
}

function InStr(str,substr,start){
    var chkStr = new String(str);
    return chkStr.indexOf(substr,start);
}