function IsPopupBlocker()
{
	var strNewURL = "pbd.php"
	var Strfeature = "height=0,width=0,toolbar=no,resizable=no,scrollbars=no,status=no,menubar=no,location=no";
	var WindowOpen = window.open(strNewURL,"MainWindow",Strfeature);
	if(obj=WindowOpen.name)
		WindowOpen.close();
	else
		DisplayPopupBlockerDetection();
}

function DisplayPopupBlockerDetection()
{
	alert('Popup blocking must be disabled');
}