is it possible to have active submenus stay expanded?
Like this http://www.biologika-register.de/en/home/
When someone click on the Mainmenu on „About RaBBIT” the Submenu will expanded and more entrys are be available.
In the Submenu are one more submenu (Background) that shows more (sub-sub) Pages.
The active Main- and Sub-(Sub) Menu entry will be bold.