unclosable menus

[conk...@gmail.com]

I have a page layout in which there is a Menubar at the top of the page
and an Frame at the bottom. Clicking on an item in the menu causes the
iframe to display a new page. However, it seems that when I open a
menu and then decide not to select something and instead just click on
a spot outside of the menu, the menu does not go away. Most users
would expect the menu to go away when they click outside of the menu,
but the frame seems to be sucking up the mouse clicks. Is there a way
around this?

Ben