Drag and drop between windows
I have a page that loads and then that page's JavaScript opens a popup window that will become a gallery. The user will upload images, using JavaScript and PHP that is part of the popup gallery window, and these uploaded images will be displayed in the gallery window that we popped up
Once several images have been uploaded and displayed in the gallery window I would like to drag and drop them into the primary window. Actually I'd like to leave the image in the gallery and just drag a ghost image across and drop it in the main window, so we end with the image in both windows.
This seems a bit tricky since the main widow and the popup gallery window are different JavaScript execution contexts. How can I implement a jQuery Drag and Drop that works from the popup window to the main window?
Thanks for any ideas.