[TYPO3] hide empty submenu (via css)

[Felix Natter]

hello,

I need to hide (display: none) a level2-menu if there
are no entries.

I looked at the tsref (HMENU, if) but unfortunately I couldn't find
the solution. Can someone please point me to the documentation?

A similar problem exists for the news-container: it is filled with
content elements (templavoila). If there is no content element in it,
it should be hidden (display: none). Any hints are appreciated.

thanks,

-- 
Felix Natter