How to create vertical and horizontal menus with RoR

Hi all

I am designing an applicaiton that needs horizontal and vertical menus,
and I would like to know how to create them with RoR

I am looking for something similar to the left vertical menu from
Amazon (http://amazon.com) called Browse. And the horizontal menu on top
of the pagewith tabs and links.

Also the horizontal an vertical menus for this web site seems very user
friendly http://mamboserver.com

any suggestions?

This is possible with just pure CSS. In Rails you would just assign a helper
method to spit back the appropriate structure. Still there's probably plugins
out there that make all of this a bit more turn-key.