I know it can be done. But just can't find how to do a
submenu that shows when you roll the mouse on main menu, and hides
if your mouse is anywhere else. I can imagine that I can create the
sub-menu with a movie clip symbol containing each command or choice
as a button. But waht I don't know it how to keep it hidden and to
make it only shown when you point the main menu that should
activate ths sub menu.