If formcalc:
in the change event of the checkbox put:
if ($ == 1) then
StaffSubmit.presence = "visible"
else
StaffSubmit.presence = "hidden"
endif
in the click event of the button put:
StaffSubmission.presence = "hidden"
$.presence = "hidden"
in the docReady event of the button put:
if (StaffSubmission == 1) then
$.presence = "visible"
else $.presence = "hidden"
endif