Hi
I'm just wondering if its possible to do a cascade dropdown menus example.

drop down menu1:
option 1
option 2
option 3

dropdown menu 2:
change on selected option.
if option 1 then show option 4, option 5, option 6
if option 2 then show option 7, option 8, option 9
if option 3 then show option 10, option 11, option 12


this is very useful for instances like countries and states.

I have checked all the articles and i havent seen anything like that, maybe there is an add on that can do it.
If there is something can anyone pls redirect me to it.
thanks.