I am interested in being able to apply a Mousedown layer effect to a Navbar parent button for which a child-level link has been clicked. That is:

Menu <= Highlighted
Sub Menu 1 <= Clicked
Sub Menu 2

In this way, "Menu" is demonstrated as being the current page, whereas "Sub Menu 1" is the page you clicked.

I suspect I have to abandon the Navbar function and use layer modes exclusively, but beyond that I'm not sure how viable it is to throw in some jQuery functions around my custom buttons.