====== Accessing Frames in a Popup Window in JavaScript ======
For various reasons, it is hard to access a (frameset) frame in a popup window that you just opened. So what you want to do is store information in the popup window and let it perform whatever action needed itself:
Parent window:
popup = window.open(url,name,options);
popup.parameters = ...
Popup window:
If you actually need to access a frame, you should do it the same way. I.e. put the actual functionality in the frame window:
...