i want to add different visibility to controls on notebook page

[Vinod Joseph <diana vinod gmail com>]

hi

i want to modify visibility of buttons in different pages of the
notebook widget....

my notebook widget is used to perform different actions in a series of
steps in different pages and thereby the controls need to change..

for eg....BACK button invisible or disabled in first page

NEXT button invisible in last page of the notebook

Please could you guide me with the best way to perform this procedure...

Thanks

Joe