I am working on an application and thought that it would be easy to create a
number of forms on a dialog box with a menu on the top of the dialog box.
Depending on which button was clicked on, a frame would be made ".visible"
and all the other frames would be set to ".visible=false". Once I make the
first frame visible, I don't seem to be able to get that frame to become
invisible and another frame visible. Is there something obvious I'm missing?