I'm assuming that the "ct100_ContentPlaceHolder1" part of the clientID may change if I move my page to another server, so I'd like to write code that can find the control regardless of what .NET tacks onto the front. Can anyone help? :)
P.S. I know on the server side you can use the .ClientID to get the clientID, but I need a purely client-side solution because I'm working with the AJAX animation extender and I need to test for the existence of a control before I try to animate it.