var mywindow
function Register(email)
	{

		
		
		var windowprops = "location=no,scrollbars=no,menubars=no,toolbars=no,resizable=yes,left=" + ((screen.width - 320) / 2) + ",top=" + ((screen.height - 300) / 2) + ",width=320,height=300";
		var URL = "/newsletter/RegisterThankYou.asp?email=" + email;		
		if (!(mywindow == null))
			mywindow.window.close();
		mywindow = window.open(URL, "Register", windowprops);
	}