function DoCallback(data) {
// branch for native XMLHttpRequest object
if (window.XMLHttpRequest) {
req = new XMLHttpRequest();
req.onreadystatechange = processReqChange;
req.open('POST', url, true);
req.setRequestHeader('Content-Type', 'application/x-www-formurlencoded');
req.send(data);
// branch for IE/Windows ActiveX version
}
else if (window.ActiveXObject) {
req = new ActiveXObject('Microsoft.XMLHTTP');
if (req) {
req.onreadystatechange = processReqChange;
req.open('POST', url, true);
req.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
req.send(data);
}
}
}
function processReqChange() {
// only if req shows 'loaded'
if (req.readyState == 4) {
// only if 'OK'
if (req.status == 200) {
eval(what);
}
else {
alert('There was a problem retrieving the XML data: ' +
req.responseText);
}
}
}