Is this at all possible? I want to have a common loading panel, that covers my entire page, and is shown no matter what ajaxcontrolid is issuing the call. I know I can do it by creating an ASP panel around the entire page, but that would also transmit all the data within that panel... which is exactly what I'm trying to avoid. I want to have Control A update Control B, and Control C update Control D, etc. but any of these minor updates need to show a loading panel over the entire page.