Impervious to a Mask

programming flash
1

I have a scrolling nav system that has popup tooltips. I have to have the nav under a mask for the scrolling ability, but it ends up cutting off the tooltips.


private var msk: Shape = new Shape();
...
msk.graphics.beginFill(0,0);
msk.graphics.drawRect(0,0, bg.width, bg.height);
menu.mask = msk;
addChild(msk);
...

Is there a way to assign specific elements under a mask to be unaffected?