Hi guys

When I'm looking at the homepage for www.devx.com, there is a menu on the
left with several choices, namely Application Server, ASP, Careers, and so
on. If I click on any of these options, a drop-down menu appears. IF I click
on ASP, 7 new options appear.

My question is: what do I need to do to implement that on my website? I tried
viewing the source, but it couldn't provide any insight. Might there be a
tip in the tip library...?

Many thanks