How to check whether music has finished playing and go to another frame

Question

I have a bunch of music samples which are set up to play on
the click of a button, and at the same time go to another frame in
the movie clip so it says 'playing', with a stop button that takes
you back to frame 1. If you don't click stop, though, when the song
ends, it stays on this second frame, even though there is nothing
playing anymore, which is a bit confusing for the viewer.
So I need to tell flash to check whether the song is finished
playing, and then if it is, go back to frame 1. I have no idea how
to do this; have basically done it all using tutorial and samples
and my limited actionscript knowledge, but I can't find this
particular code, and don't really have any idea how to write it
from scratch.
Many thanks!
Here's my first frame actionscript:
stop();
this.createEmptyMovieClip ("mcSoundHolder",
this.getNextHighestDepth());
var mySound:Sound = new Sound (mcSoundHolder);
btn_Song1.onRelease = function():Void {
stopAllSounds();
mySound.loadSound("Soaring1-Burlesque.mp3", true);
gotoAndPlay("Song1");
btn_Song2.onRelease = function():Void {
stopAllSounds();
mySound.loadSound("Soaring2-PopCyclePotpourri.mp3", true);
gotoAndPlay("Song2");
btn_Song3.onRelease = function():Void {
stopAllSounds();
mySound.loadSound("Soaring3-PopCycle-SongofLight.mp3",
true);
gotoAndPlay("Song3");
and so on...

Answer 1

I am not sure how Tomcat handles this, but you need to use two-way (mutual authentication) request but not enforce SSL between Tomcat and the client browser. This will make the browser prompt the user for the cert they want to send. Then you'll need to tackle the other part of your problem, getting the correct content displayed depending on whether the user sent a cert or not. I'm even less help there than I was on the first part of your question.
So, yeah - good luck with that
Lee