How to swap images in another frame

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From: awesterink (no_at_spam.com)
Date: 12/28/04 

Date: Tue, 28 Dec 2004 14:24:22 -0500

If I have a simple 3-frame design (frame_leftmenu, frame_topbar,
frame_page), how can I best obtain the following result when clicking a
button in the left menu:
- loading a new page in frame_page
- update a graphic in frame_topbar

I know I could create 2 nested framesets, and a have a menu click result in
a load of a new top AND page frame. But given that I am using a background
graphic in the top frame that blends into the menu graphic, I don't want to
see that top graphic disappear for a split-second while the top frame gets
refreshed. Basically, I want the top frame to stay loaded, but only swap an
image in it. Is that possible?

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