ActionScript 3.0 :: Flash Menu - Two Click Functions On One Button

I'm making a menu in flash and I want that when I Click the button/movieclip moves up and when I Click again it moves down again. I already did it with MOUSE_OVER and MOUSE_OUT but that gave me problems.

Here is the Code:
Actionscript Code:
//Eventlistenersmenu_over.buttonMode = true;
menu_over.addEventListener(MouseEvent.MOUSE_OVER,onOver,false,0,true);
menu_over.addEventListener(MouseEvent.CLICK,onOut,false,0,true);
//Functionsfunction onOver(e:MouseEvent):void {menu_over.gotoAndPlay("menu_op");
}function onOut(e:MouseEvent):void {menu_over.gotoAndPlay("menu_beneden");
}