Add active class to parent with active child

I add this code to the js, as I need to know which parent have active child, so I can theme it further. Might help others too :

var activeParentIdx=megaParents.index($(megaParents).has('.active'));  megaParents.eq(activeParentIdx).addClass('active');

Btw, I'm using this with D7 (of course with some changes on the code). Thanks for the original module.