var fbShare = {url: ‘http://www.uipattern.com/mega-drop-downs/’,size:’large’} Mega drop-down menus are a relatively new pattern but can be seen at most of the site very soon.
Jakob Nielsen summaries this
Big, two-dimensional drop-down panels group navigation options to eliminate scrolling and use typography, icons, and tool-tips to explain the user’s choices.

The biggest benefit of using Maga drop down [...]