dynamic forms - if this is selected, then this is your new choices...

I'm seeking something similar to this:

http://www.nvidia.com/content/drivers/drivers.asp

Can someone point me in the right direction? It would need to work in most browsers, if not all. Thanks

Ash

I've something like that:

http://www.angelfire.com/mo2/cbch21/TEST/Country.CitySelect2.html

There are others, but at the moment I can't find them...