Flash 8 - random array

Hoping someone can help as there is probably an easy solution…:crazy:

I am trying to create a random question generator that will see each question only come up once. I would like the question to appear on a button press. I have a very simple button that does the random aspect at the mo. All questions are contained in a movieclip.

on (release) {
//Movieclip GotoAndPlay Behavior
this.gotoAndPlay(random(5));
//End Behavior
}

Is there something I can add to this code to make it so that each frame is only visited once or do I have to start again with arrays etc?

thanks