Passing values between windows

[Todd Cary]

I have a button that creates a new window. The surfer may enter data in
the new window, and if he does, when the window is closed by the surfer,
can the information update fields on the original page - the page/window
from which the new window was created?

I have seen instances where the surfer can open a new window to get
email addresses and these addresses appear in the first window.

Can someone point to an example?

Todd