hey ive got a video as a movie clip that plays when i click a button, but i want to be able to click that same button again to make it stop but cant seem to pull this off.

here's what i have so far:

jerry_mc.stop();

jerry_btn.onRelease = function() {
jerry_mc.play();

}

this works to play it, but obviously doesnt stop it.
any advice?
thanks for any help.
jon