function showDetail(checkBoxShipmentId)
{
	xmlhttp = GetXmlHttpObject();   // this calls function below 
	if (xmlhttp==null)
  	{
  		alert ("Browser does not support HTTP Request");
  		return;
  	}
 
	var url="detailBackend.php";
	url=url+"?shipmentid="+checkBoxShipmentId;    //?shipmentid = value of the checkbox, which is the shipmentid
	url=url+"&ran="+Math.random();
	if(xmlhttp.readyState ==4)
	{
		xmlhttp.onreadystatechange= displayDetail;
		xmlhttp.open("GET",url,true);
		xmlhttp.send(null);
	}
 
	else
	{
		status = xmlhttp.readyState;
		alert(status);       ///// this always return 0 ///// 
	}
 
}

function GetXmlHttpObject()
{
	if (window.XMLHttpRequest)
  	{
  		// code for IE7+, Firefox, Chrome, Opera, Safari
  		return new XMLHttpRequest();
  	}
 
	if (window.ActiveXObject)
  	{
  		// code for IE6, IE5
  		return new ActiveXObject("Microsoft.XMLHTTP");
  	}
	return null;
}

var xmlhttp;
 
function showShipment(shipmentIdFromDropDown)
{
	xmlhttp=GetXmlHttpObject();
	if (xmlhttp==null)
  	{
  		alert ("Browser does not support HTTP Request");
  		return;
  	}
	var url="responsexml.php";
	url=url+"?q="+shipmentIdFromDropDown;
	url=url+"&ran="+Math.random();     //generate a random number and store to variable ran to make sure cookie or session don't make them all the same
	xmlhttp.onreadystatechange=stateChanged;
	xmlhttp.open("GET",url,true);
	xmlhttp.send(null);
}