This page demonstrates a horizontal menu bar with two levels of pop-outs, which is as far as I'm going to take this project at present.

The second level pop-outs are viewable from the Home and the Workbench menu items.

To view the development of this project in stages since the original horizontal menu bar, start here.

stylin' with CSS website  At this point, lines still don't show on the top of the drop-down or pop-out menus either on my page or the author's version.