Basic funcion question

Hi everyone.

Here´s the scenario:

On my page I have a movie clip that is mostly hidden behind a mask. Then on (rollOver) I tween it onto a different posicion, where bigger part of it is visible. on (roolOut) it hides again. Now I need to put a button inside that movie clip. Since the clip has a mouse event on it, it will not recognize the button inside it. What i need to do is make a zone for the mouse pointer that will make my clip show/hide. My programming skills are very much limited so i rely on you people to help me out :).

The question:

What code should i use (on the frame? I suppose) to have the clip tween when the mouse is over it (or outside it) whitout using mouse events on the clip.

Hope i make myself clear.

Waiting for ideas…