Aha. Well, loadMovie() loads SWFs, JPGs, and the like into a movie clip
target. That might be the main timeline (which is a movie clip) or an empty
movie clip target -- but it's not going to put anything into a new window.
The "_blank" parameter of getURL() operates essentially the same way an
anchor tag does (target="_blank"), which does open a new browser window
every time. If you want to open a new browser window once and keep reusing
knows what to do with it -- so you'll have to use ActionScript to pass your
name, so that you can then continue referencing that name as you send new
images (or HTML documents, or whatever) to it.
ExternalInterface class, so check that out in the ActionScript 2.0 Language
Reference and see if the example code gets you started. If you get stuck,
write back and I'll continue to follow up with you. You'll use ActionScript
Co-author, Foundation Flash CS3 for Designers
"Luck is the residue of good design."