joomla - CSS menu hide current submenu when other menu item is hovered -

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i'm designing new website, have following problem:

in menu, when open page sub menu, , hover menu item without sub menu want display empty gray bar. i've got no clue how this. reproduce go page: http://www.kvvikingvenlo.nl/joomla/nl/aluminium-gietwerk.html , hover on home item in menu. (home has no sub menu, want gray bar empty.)

edit

i'm sorry, question seems quite hard understand. lets try again:

on web page http://www.kvvikingvenlo.nl/joomla/nl/aluminium-gietwerk.html there menu displays current sub menu, until hover different sub menu. part working.

but when hover home, still see:"ontwikkeling, hogedruk spuitgieten, cnc-nabewerking , montage".

these sub menu items of parent "processen" (which current active one)

because home not have sub menu items, want bar empty instead.

i think have through javascript, have .active on ul , parent li parent a in order change child tag display .active through javascript. hope makes sense.


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