zookd
Just add the FileChooser object onto the menu screen and add this event.
Browsers don't like cross-domain access by default. There is a comment in the code about this, and you may have to deal with this yourself. The rules can be quite picky. If you try the official demo, it works. In the FileChooser demo, the address is missing the www. prefix. If you add that, you'll see it works again.