Drop down plugin

I am looking for a customisable plugin that has a drop dowm ‘jump’ type list like the one here. http://www.acwilgar.co.uk/quote1.asp?p=001
I want to do a similar thing but a little more complex in that each list will have options based only the previous selection…..all on one page would be great too.

Example, I choose option ‘A’ from A-B-C on the first list. This gives me options 1-2-3 on the second list. Option B on the first list would have given me options 4-5-6 on the second….I think thats clear?

Probably an easy answer but I am still a novice with wrordpress.
Thanks

Dan