Website issues

Hi. I know there are a lot of programers and I was wondering hwo to create a drop down menu navigation like the one on this website. I tried following some codes, but I don't get it. If someone could please help me. =)

You could try the following drop down menu script here:

The steps are pretty straightforward. Just follow to the end of Step 2, where it says "that's it for installation" and you're done. All you will need to do after that is edit the various "lists" that the code is generating for each tab.