Linked Drop-downs lists
I have been looking for a way to link some drop down lists and have not seen a solution(please link if it already exists). Example select state options would be VA and MD. Then based on the selection the city list would change to meet the state selection. If i select VA then on the city list would show Richmond and Lynchburg and if i pick MD then B'more and Gaithersburg and so on. In Italy the the drop down lists would be Region(State), Province(County), Comune(City). I would like to know how to make all of these link. I hope this is clear. Thank you in advance.