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Wanted: Free $ Conferencing applet with callbacks?

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In the book "Java Servlet Programming" by Hunter et al they describe how to implement asynchonous callbacks via java RMI.

I have been planning to write a little applet and servlet pair that would allow me to sit at my home office and have my virtual students stay in sync with me becuase this applet I was going to write was going to disperse my current browser URL to their html FRAME and so they would always be on the same web page I am on.

Does firefox still allow this async rmi call back to the browser resident applett with the default security settings? Would I still have to write such a servlet/applet pair? Surely after all these years of determined and tough procrastination someone has already written such a application! I don't even know what to google search for though.

I'm not talking about anything fancy like gotomeeting or webex (which would be fine if they were free). Just something really simple that allows the instructor's applet to disperse the same URL to all his student subscriber applets and those applets call back to the browser javascript to navigate a subframe to that URL.


[ December 09, 2008: Message edited by: Siegfried Heintze ]
[ December 09, 2008: Message edited by: Siegfried Heintze ]
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