How do I pass text across browsers?

I want my browser to pop a window
and then have that popwindow.1 be able to pop another window based on selection. Then finally popwindow.2 will pass text back to the original browser window. Sound confusing? I mocked up a flash version of it. http://donorport.com/mail.html (130k)
I just can't figure out this last bit.

Big ol' TIA

Use the DOM property window.opener. Say your second popup needs to change the variable flipflop in the original window to a value of 1. The code would look like:
window.opener.opener.flipflop = 1;