I have a street address and a billing address. A question is posed with a checkbox — "Is the billing address the same as the street address?" If Yes is checked, the street address automatically fills the billing fields. If No is checked, the user must fill in new information. In both the street address and billing addres, the State field is a drop-down list. How can I get the drop-down list selection in the street address State also be selected in drop-down list for the billing address State?