I've got a RadGrid in an UpdatePanel and I'm using a ScriptManager.  What's the earliest point in the page life cycle that I can detect I'm in an Ajax call, for example when a user clicks the edit button in the RadGrid?  Specifically, can I detect that the user has clicked the edit button (or any other Ajax action) at PreInit?  If so, how?
Thanks,
Kevin
                                Thanks,
Kevin

