ActionScript 2.0 :: Classes File - MovieClip Buttons To Animate In And Out

I'm working with an ActionScript Classes file for some MovieClip buttons to animate In and Out. Everything is working the way it should but I would like the button to stay indicated once clicked on and then animate out once a new button is selected. The way I set it up in the past isn't very efficient and the next project I'm working on is going to be a lot of buttons. Trying to learn something more efficient.

Here is the AS class code:
class ButtonClass extends MovieClip {
public function ButtonClass() {
this.onRollOver = this.Over;
this.onRollOut = this.Out;
} private function Over() {
this.gotoAndPlay("Over");
} private function Out() {
this.gotoAndPlay("Out");
}}

And then for the MC button in the FLA:
b1.btnMC.btnText.text = "PORTFOLIO";
b2.btnMC.btnText.text = "CONTACT";