I need a menu like the one below:
[login to view URL]
Α 3 level menu (for joomla)
When hovering a link in first column a second column slides with a 100% height and grey background color and
when hovering a link in second column a third one slides with the same characterisics as the first
When clicking a link the menu stays at the current state(selected) and if the link is from second or third column it stays open to the corresponding page