button animation?

I'm not sure what this is called or I would have done a search for it. I'm not really sure this is a photoshop technique but I figure someone in here knows how to do it. I want to have my buttons on a website change color when someone puts their cursor over the button. An example is on www.v4images.com for his navigation buttons on the left side. I'm building my site with FP 2002

Anyone know how to do this?

Its actually 2 images (the orange version and the white version) and just some javascript swap image code...
If your using dreamweaver or something like that there is usually something in there under the behavior setting that will allow you to swap the image, if not view the sorce of that page and it kindof explains itself..

you can do it in Photoshop/Imageready .. I think there are tutorials at the NAPP or w/e that org is

There are many intresting things you can do with gif animations. I suggest checking out the Image Ready help. And check for tuts online. I have a Heart monitor tutorial that touches on gif animation at http://www.geocities.com/cryptomaniac69/instructions.html .

I hope this helps.