This week's book giveaway is in the Mac OS forum. We're giving away four copies of a choice of "Take Control of Upgrading to Yosemite" or "Take Control of Automating Your Mac" and have Joe Kissell 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.