This is the tutorial at: https://blog.appery.io/2012/04/extend...
My UI is shown here, with the arrow showing the place on the grid I need the panel to go:
http://screencast.com/t/XsSNhlg2x
Incidentally, the custom javascript in the tutorial may have an error as shown here:
http://screencast.com/t/LdBdVd1hd
Thank you.