How to close an open JFrame window from a jsp page?

How to close an open JFrame window from a jsp page?

I have used the class file to create a JFrame and by importing that class file into my jsp page, and by calling a method in that class, I have enabled a JFrame window as a pop up. Now when I try to logout from that jsp page, all the sessions are closed, but this Jframe window cannot be closed.

Curious as to why you would go to all that trouble when all you need to do to create a popup is something like this:

Code:

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<a href="#null"
              onclick="newWindow('<s:url  action="whateverAction" namespace="/popup" /> ','popup','800','400','resizable,scrollbars')">
                Click here for popup</a></td>

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