I have a large list of customers and addresses. Some customers have several ship to addresses represented by a sequence number. When I type in a customer name, it automatically generates in the "bill-to". I'd like to then have a drop down that only lists that customer's sequence numbers in order to select a "ship-to". The data is as follows:

Cust......Seq
1........1
1........2
1........3
1........4
2........1
2........2
3........1

So, for example, when I select customer 1, I would like a drop down that contains seq 1-4.

Thanks for any help!

Brett