Those buttons again

Hi, I’m not too great at AS, but I’d like to know how to make buttons stay on the rollOver state after i click on them, and play the rollOut state when another button is clicked. So,

Button 1 is clicked and goes into the rollOver state. And when Button 2 is pressed, the Button 1 goes into the rollOut state while the Button 2 goes into the rollOver state.

I’ve been trying to learn a way to do this properly.

Help please!

Derek