Update Gridview on Parent....AJAX?

[Homer J.]

I have a page with a GridView. On Select it opens a popup to Insert
New Records. Either Page OnUnload or Form Inserted...I can live with
either if it works...I'd like for the GridView to update, or DataBind
(). I don't need to refresh the whole page. I've tried that and all
I get is a little message telling me that I have to refresh the
page...do I want to "Yes" or "No".

Is there a way to update the Gridview only. If so...please be
explicit for not only me but for all the people that will read this as
well.

Thanks for your expertise and patience.