How to cover a button?

I’m making a flash site wish scrolling line of little pictures. Those little pics are buttons. That scrolling line goes just on the part of the page. And so that the rest pic doesn’t how up where they are not suppose to I covered them. But if you would put mouse over that place it still changes to the “hand”. And If you would press on it if still work as a button. Is there a way to cover a button so that it doesn’t show up if I don’t want it to?