Movie clips as buttons and rollover

I´m trying the following menu, and I´d like to make them to have rollover, and rollout effects, staying in the “over” position when clicked.
When clicking in a different button, the previous clicked button should go back to normal position, but not just jump right a standard button.

How can I do that without using a prototype, because it´s a horizontal menu and the buttons have different width sizes.

Thanks 4 any help