function getXMLHTTP() {
	var xmlhttp=false;
	try{
		xmlhttp=new XMLHttpRequest();
	}
	catch(e) {
		try{
			xmlhttp= new ActiveXObject("Microsoft.XMLHTTP");
		}
		catch(e){
			try{
				xmlhttp = new ActiveXObject("Msxml2.XMLHTTP");
			}
			catch(e1){
				xmlhttp=false;
			}
		}
	}
	return xmlhttp;
}

function getPacket(strURL) {
	var req = getXMLHTTP();
	if (req) {
		req.open("GET", strURL, true);
		req.onreadystatechange = function() {
			if (req.readyState == 4) {
				// only if “OK”
				if (req.status == 200) {
					document.getElementById('packet').innerHTML=req.responseText;
				} else {
					alert("There was a problem while using XMLHTTP:\n" + req.statusText);
				}
			}
		}
		req.send(null);
	}
}