Alas, no go.  The debugger tells me document.parentWindow.history.length == 0, and this is the frame named "bottom" in which I am operating. This history.length == 0 does seem to contradict the concept of Time being Mother Nature's way of keeping everything from happening at once.  I put this down as being another fun excursion into the fever swamp and will hope that someday I shall be further enlightened.