Button customization

Could someone link me a to a list of most/all styling effects that you can add to buttons?

I want to be able to add images, control shape, color, borders, color borders, text, text font, size and a few other things.

I also want to control what happens when you hover over it, which is javascript correct?

Can't say answer to all questions, though take a look at http://stopdesign.com/archive/2009/02/04/recreating-the-button.html to see how to style the <botton> element.