Buttons change tint after click

Hello again!! I have a couple of buttons that load external jpgs to a movie clip. Is it possible that after i click a button, the tint of that button change so that people know they already been there?
other option, is that after clicking button 1 the tint changes from x to y and if you click button 2 the tint in button 1 goes back to x, and the tint in button 2 now is y…
hope that i made myself clear… its the best way i can explain my problem…

thanks everybody!!!