New at Flash, please help! Sound On/Off Button

Question

I'm trying to create a button that when clicked once, it plays music, and when clicked again, it stops. I don't need the button image to change at all, I just need a simple start/stop.
I've been able to make the button start the music when clicked but I've not been successful in making it stop.
I am using CS4, and have no scripting experience.
This is for a graphic arts assignment so please help!

Answer 1

drag your button to the stage and assign it an instance name (eg, btn).  you can then use:
var sound:MP3=new MP3();
var sc:SoundChannel = sound.play();
btn.addEventListener(MouseEvent.CLICK,f);
function f(e:MouseEvent):void{
if(sc){
sc.stop();
sc=null;
} else {
sc=sound.play();