Death of a Clown wrote:
I'd suggest saving it as a png. Gifs make jagged transparencies.
The only downside of a png is that IE doesn't support it. Everyone should be using Firefox though, <_<
I couldn't get splodge's page to open, and if you can't either, check out
http://www.awesomebackgrounds.com/powerpointtransparency.htm...they give a 'dirty' method for adapting the image which might not be too useful in animations, but as Death said, using a PNG is the way to go...and get flash.
Gifs are awful because they use indexed colors. A fine solution before we had real compression schemes, but for the most part obsolete--modems don't run 2400 baud anymore...at least I hope yours doesn't.
BTW, check out
http://homepage.ntlworld.com/bobosola/pngtestfixed.htm for a method of using PNG w/alpha in IE (view source for the JS that you add to your page).