Choose value from one of 2 fields
I,m trying to create a value list (or, this is a wrong way to do this maybe).
I have a table with clients. Each client have 2 addresses - office (first field) and home (second field).
To create delivery record for each client I have to choose at another layout which address to use for delivery - office or home. And then this address should be saved to delivery_address field in the table with inforvation on delivery terms.
What is the best way to do this value list (or any other script/trick) to choose from 2 variants stored in 2 fields?