//	Asynchronous Javascript and XML

function loadXMLDoc(url)
{
   // branch for native XMLHttpRequest object
    if (window.XMLHttpRequest) {
        req = new XMLHttpRequest();
        req.onreadystatechange = processReqChange;
        req.open("GET", url, true);
        req.send(null);
    // branch for IE/Windows ActiveX version
    } else if (window.ActiveXObject) {
        req = new ActiveXObject("Microsoft.XMLHTTP");
        if (req) {
            req.onreadystatechange = processReqChange;
            req.open("GET", url, true);
            req.send();
        }
    }
}

function processReqChange()
{
    //alert (reg.readyState);
   // only if req shows "complete"
   if (req.readyState == 4) {
        // only if "OK"
        if (req.status == 200) {
             response  = req.responseXML.documentElement;
            method    = response.getElementsByTagName('method')[0].firstChild.data;
           result    = response.getElementsByTagName('result')[0].firstChild.data;
          //alert (method) //checkName('',result)
          eval(method + '(\'\', result)');
       } else {
            alert("There was a problem retrieving the XML data:\n" + req.statusText);
       }
    }
}