Milonic JavaScript Menu

I tried this out on my pc and I can make the menus stick, but when I click outside of the menu (elsewhere on the web page, deliberately somewhere that the menu isn't) the menu doesn't go away. In fact, I can get many drop-downs displayed at once. I've almost a solution here...

My site is currently using a hacked version of HierMenus. When a user clicks on a main (horizontal) choice, a vertical list of choices appears. No problem there. But this vertical list must stay visible / active, even if the user moves the mouse all over the screen. If the user comes back and clicks ...