How do i populate one field based upon a drop down select from another field?

Here is what I am trying to do:

Field 1 is a drop down selection list that requires a user to make a mandatory selection which in this case is a list of apartment complexes. What I am trying to accomplish is once that user makes a selection from the drop down list (Field1) that it will populate Field 2 (standard txt) with the corresponding apartment complexes address.

So I pick Talan Apartments from field 1, it would populate field 2 with Talan Apartments address. I tried messing around with calculation scripts but I'm fighting a loosing battle here. Some help would be greatly appreciated!