Timer - How to stop it? AS2

Question

I am learning how to make a timer to my game. It is something like "Who wants to be a millionaire?" I have 15 questions. There is timer for each question:60 seconds.... When I click on an answer I go on next frame, but my timer does not stop. What should I add ( and where ) to stop my timer when I clik an answer? (Flash Professional CS 5/ ActionScript 2) My code for the timer is:

timer = 60;

    countdown = function(){
    _root.timer--;
    if(_root.timer<=0){
      gotoAndPlay(20); stop();
    }
    }
    countdownInterval = setInterval(countdown,1000);

Answer 1

Try this

var timer:Timer = new Timer();

public function startTimer(n:Number):void{ //n = number of seconds you want to run the timer
   t.repeatCount = n;
   t.start();
   t.addEventListener(TimerEvent.TIMER_COMPLETE, timerComplete);
}

public function timerComplete(event:TimerEvent):void{
   t.removeEventListener(TimerEvent.TIMER_COMPLETE, timerComplete);

   //What ever you want to do when timer is up.
}

Hope it helped!