Drop downs within drop downs in navbar

[Bacon Butty]

Hi there,

Quick question really, I am hoping someone could tell me how I can achieve drop down menus within drop down menus on the navbar.

So in other words, my current navbar is like this;

http://img516.imageshack.us/img516/351/71511571ti1.jpg

Would it be possible to have the one drop down menu called "forums" and within this drop down menu have the search option and user cp drop down?

Any help at all greatly appreciated.