navigation list

Hello,

I've been wondering how to implement the navigation lists (nl) in xhtml 
2. I ended up to use the active pseudo-class to nl element to indicate 
when nl's label is selected. In the default stylesheet I define style 
for the list items:

nl > li { display:none; }
nl:active > li { display: list-item; }

What do you think about that? Also, how would you style the label 
element when it's selected/de-selected?

Mikko Pohja