You know when you checkout of an ecommerce web site and in the section about Shipping Address and Billing Address where it asks you if your billing address is the same as the shipping address? You can click a checkbox and it automatically populates the billing address fields for you. I want to create the same feature (not the ecommerce part). I have created some custom forms in my Addressbook and I would like to copy the address to some other fields on the custom tab I created it. How can I accomplish this?
I hope this makes sense. If not I can try to explain a different way.