function calculateDelivery()
{
	if (checkFrmDelivery())
	{
		document.forms["frmDelivery"].submit();
	}
}

function checkFrmDelivery()
{
	if (document.forms["frmDelivery"].postcode.value == "" || document.forms["frmDelivery"].postcode.value == null)
	{
		alert("Please enter the destination postcode.");
		return false;
	}
	
	if (document.forms["frmDelivery"].quantities.value == "" || document.forms["frmDelivery"].quantities.value == null)
	{
		alert("Please enter the quantities.");
		return false;
	}
	return true;
}

function pop( url)
{
	var W = 600;
	var H = 500;
	var opps = "menubar=no,status=yes,location=no,width=" + W + ",height=" + H + ",screenX=0,screenY=0,left=0,top=0,toolbar=no,scrollbars=yes,resizable=yes"
	popWin = window.open(url,"newWin",opps);
	popWin.focus();
}