function DoCallback(data){if(window.XMLHttpRequest){req=new XMLHttpRequest();req.onreadystatechange=processReqChange;req.open('POST',url,true);req.setRequestHeader('Content-Type','application/x-www-form-urlencoded');req.send(data);}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(){if(req.readyState==4){if(req.status==200){eval(what);}else{alert('There was a problem retrieving the XML data : '+req.responseText);}}}