I am trying to implement a similar menu behavior as on Harvard's website: http://www.seas.harvard.edu/computer-science where all the sections drop down no matter which link you put the mouse over.
Does anybody know what they are using for that? The closest I could find is the jQuery Superfish menu, but it only allows to open one menu section at a time.
Thank you in advance!
I've created a demo on JSFiddle which portrays what I was talking about in my comment. The particular result you are looking for is a simple modification of a normal drop down menu. Instead of having each of the drop downs be their own separate divs, you put them in a container div and display it when a drop down is needed.
So instead of:
<div id="drpDwn1"></div>
<div id="drpDwn2"></div>
<div id="drpDwn3"></div>
You'd have:
<div id="drpDwnFull">
<div id="drpDwn1"></div>
<div id="drpDwn2"></div>
<div id="drpDwn3"></div>
</div>
You would change the visibility on drpDwnFull
instead of the individual items to get the full menu effect.
Then you can add highlighting as you wish. In my Demo I chose to highlight the menu associated with the menu item, as well as the individual item you are hovering over.