in a window, the menubar's width needs to extend one more pixel
past its container ( which has the same width as the content ) so
it's default width is immediateparent.width + 1
Methods (1)
openMenu()
<method name="openMenu" args="menuref, openit" />
public function openMenu(menuref : Menu, openit : Boolean);
opens ( or closes ) requested menu and closes any other menus that are currently opened