Buttons stay in over/down state?

Hello:

I have a movie with several thumbnail buttons. -These buttons are visually highlighted on the over and down states.

There are 60 buttons on the page and I want to be able to keep the button in the highlighted state after the surfer clicks on the button so they can keep track of which buttons they clicked on (like on a purple visited text link)

A little AS with the Button class, maybe? I went through the Property Summary in the AS Dictionary and couldn’t quite find the property I was looking for. Thank you.