html5, play(), stop(),gotoandPlay(), gotoAndStop() and timeline ?

Hello !

I'im trying to create a timeline with  2 movieclips ( movieclips A and B for example)

Movieclip A is located at frame 1

Movieclip B at frame 5

There are 4 layers

1) for moveclip A

2)for movieclip B

3) for  labels

4) for actions

On layer 4 I put at frame 1 this.stop(); to stop the reading head for allowing it to play movieclip A

Movieclips A &B finish both with this.stop();

I woulld like to read now movieclip B at frame 5.

Who could help me to write the right Js code at  the right place ?

Thank you

Jack