Drop down menu to navigate to sections on the same page?

Hi,

Would anybody know of a plugin that allows placing a drop down menu that users may use to navigate to various sections on a page?
If you would take a quick look at this page, although it is in Dutch, you will see what I mean. The user puts his cursor on the downward arrow next to the box, scrolls through the list, clicks on a term, and the page jumps to the corresponding section.

Any suggestions that work with Atahualpa are highly appreciated!

Thanks,

Rutger