This week's book giveaway is in the OCMJEA forum. We're giving away four copies of OCM Java EE 6 Enterprise Architect Exam Guide and have Paul Allen & Joseph Bambara on-line! See this thread for details.
Again, the fact that the request is coming from a frame is not known to the server. It just sees the request coming in as if from a "normal" window. So anything that'd work for a normal window will work for the frames.