linked navigation bars

I would like to create a navigation bar, that gets triggered when pressing a link in the main navigation bar. The 2nd navigation bar should have clickable links that when hovered on, should show a diff navigation node.

what i did so far is the impex of the custom navigation window. It shows a new node in the smart edit. however no new navigation bar is shown in the front end

in which jsp file should i add the new nav bar and the onhover? how can i attach the diff page slots to the onhover