[thelist] name for this type of menu ?

[Birdie]

Hi,

What is the term for the type of menu displayed on this site :
http://www.nyse.com/

When you click on a menu item a drop down list of sub menus appears.

Would I google for expandable or collapsible menu ? Or something else ?

 

This menu is done in flash but we need a non flash version.

 

Anyone know of any good tutorials or scripts to get this effect.

 

TIA

 

Lisa