[Mediawiki-l] Navigation left main menu : how to change the style like a TreeView menu ?

[Platonides]

Mirco Santori wrote:
> Does anybody know how to change the menu style for navigation section placed
> in the left of the main page ?
> 
> I noticed that in the mediawiki web sites it appears lie a TreeView with
> child note and amazing styling. 
> 
> Hope someone could help me ..
> 
> thanks in advance
> 
> M.

CollapsibleLeftNav
http://www.mediawiki.org/wiki/Extension:Vector