Drop down Menu Auto Select

[M82A1M]

I have seen this on some sites where you select something in a drop down menu and automatically the below drop down menu's info changes according to what you selected in the first one.

Cheers.

[thetestingsite]

I think this is what you are talking about, but if not try being a little more specific.

http://www.dynamicdrive.com/dynamicindex16/chainedselects/index.htm

Hope this helps.