WARNING: Actions on button and MovieClip

Question

I have the following code that I am trying to get to work
with ActionScript 3.0:
on (rollOver) {
gotoAndPlay("s1");
on (releaseOutside, rollOut) {
this.gotoAndPlay("s2");
on (release) {
this.gotoAndPlay("s2");
The problem is that ActionScript 3.0 will not allow the
script on a MovieClip instance. I am at a loss with what to do, I
work well with examples, so I have posted 2 source FLA that are
identical, the only difference is that one targets ActionScript 2.0
(and works), the other targets ActionScript 3.0 (and does not
work).
Please
take
a look

Answer 1

There is no need to grasp the changes that fast. You can
still publish files for AS2.
Personally though I am always amazed that folks are still
using the on(clipEvent) style of coding. Generally that style of
coding should have gone away with the introduction of the
MovieClip.onClipEvent syntax with Flash 6 – introduced in
Spring of 2002. If you have been programming AS since 2002 and are
still relying solely on on(clipEvent) then you have bigger issues
than AS3. If you have come to AS more recently I just wonder why
this style was the one you adopted. (By "you" I don't mean you
– tmcquage – specifically. I mean you in the general
sense, and I include all of the Flash community in why did we allow
this to happen.)
You could probably answer that question yourself quick than
posting here! But I just tested it and the stop(); works fine.
I would recommend sticking with AS2 for the time being. Learn
how to use all the movieclip methods from the main timeline, not
from on an instance. Then the change over to AS3 won't be such a
shock. Even if you never go to AS3, you will be so happy you
stopped using instance code. Really.