var discount_var;


function showDiscount(totalcost ,coupon_code,client)
{
discount_var=GetXmlHttpObject();
if (discount_var==null)
  {
  alert ("Browser does not support HTTP Request");
  return;
  }
var url="getdiscount.php";
url=url+"?coupon_code="+coupon_code;
url=url+"&total_cost="+totalcost;
url=url+"&client="+client;
url=url+"&sid="+Math.random();
discount_var.onreadystatechange=stateChanged3;
discount_var.open("GET",url,true);
discount_var.send(null);
}



function stateChanged3()
{
if (discount_var.readyState==4)
{
document.getElementById("discount").innerHTML=discount_var.responseText;
	
}else{
	document.getElementById("discount").innerHTML = "Please Wait";
}

}

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;
}