I don\'t think I\'ve been able to find a definitive answer on this, so I\'ll ask it here. When is a ScriptManager (or ScriptManagerProxy in the case of using a ScriptManage
ScriptManagerProxy enables a content page to pass references to the ScriptManager placed on its ASP.NET master page.
Here is an asp.net video: http://www.asp.net/Learn/ajax-videos/video-95.aspx
Thanks
Joe