priority

a) project page
	desktop.add(help, HELPLAYER);
b) new & old form
	desktop.add(doc, DOCLAYER);
c) html & wor
d) calendar
	desktop.add(doc, DOCLAYER);

a) project page OVER b) new & old form
a) project page OVER c) html & wor
a) project page OVER d) calendar

b) new & old form UNDER a) project page
b) new & old form OVER  c) html & wor
b) new & old form EQ TO d) calendar

c) html & wor UNDER a) project page
c) html & wor UNDER b) new & old form
c) html & wor UNDER d) calendar

d) calendar UNDER a) project page
d) calendar EQ TO b) new & old form
d) calendar OVER  c) html & wor

filechooser external & OVER all
OptionPane OVER all & blocks all activity