var xmlhttp;

function track() {
xmlhttp=GetXmlHttpObject();
if (xmlhttp==null)
  {
  alert ("Browser does not support HTTP Request");
  return;
  }
	var r = document.getElementById('ref').value;
	var p = document.getElementById('postcode').value;
	$blindup('response');
	// document.getElementById('response').innerHTML="";
		var url="ajaxincludes/track.php";
		url=url+"?r="+r;
		url=url+"&p="+p;
		url=url+"&sid="+Math.random();
		xmlhttp.onreadystatechange=trackorder;
		xmlhttp.open("GET",url,true);
		xmlhttp.send(null);
}
function trackorder() {
	if (xmlhttp.readyState==4) {
		document.getElementById('response').innerHTML=xmlhttp.responseText;
		$blinddown('response');
	}
}
function GetXmlHttpObject() {
if (window.XMLHttpRequest) { return new XMLHttpRequest(); }
if (window.ActiveXObject) { return new ActiveXObject("Microsoft.XMLHTTP"); }
return null;
}