Javascript: Child windows talking to each other?

Hi,

Im trying to design a fun page where a after an onclick on the parent page, several small child windows are opened. Upon clicking the content of any of those windows, I want all of the child windows to close. I can get self.close() to close the clicked window, but I cannot communicate with the other child windows, even if I reference them by their name, ie winName.close()… are there special rules for doing this?

A miniaturized version of what I am trying to do can be seen here:
http://stevenewberry.com/experimental/randombirds1.html
(click the red square!)

Thanks for any insight you may have…