With a bit messing around I finally got the animation to work.

this is the pretty much final thing; http://home.orange.nl/mfranssen/button_2~.swi

Thanks for the effort though

Anyway, I didn't get the transparency issue fixed, but I'll search the forum for any clues. As for the transparency, I need the white background to be transparent. The animation needed to be from grey to red. Just a transparant background so the image on the original site gets through.