A link in the main window opens a new window just by regular <a href ="sub_window.html" target="_blank"> html tag. How to notify the main window when this sub_window.html window is closed? The requirement is not to use javascript to open the new window. I can get it work for IE and NN7 but no clue for NN4. Any idea?
Thanks in advance!
UserAgent: Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.0)


