JQuery :: Menu Which Imitates A Desktop Application Menu Toolbar?

I 'm working on a menu which imitates a desktop application menu toolbar (like this on your firefox ).Here's a demo[1] The menu is an <ul> containing <li> elements and <ul>s for sub-navigation.[2] User clicks the top-nav <li> with the arrow indicator and sub-menu pops out.[3] By clicking again the sub-menu hides.[4] Also by clicking outside the top-nav <ul>, a visible sub-menu hides (i used focusout event for this one).[5] Last one, a usability enhancement. Once a user clicks a top-nav <li> element with arrow indicator, he doesn't have to click again the rest <li>s with sub-nav. For instance, in the demo, if i click "Articles" and the menu pops out i shouldn't have to click "Games" in order to display it's own sub-nav.I'm having problems with [2]-[3], like arrow flickering as i click but before releasing the mouse button.umber [5] is a big mystery to me, i 'm not at this level right now.