My scnerio is e.g an application is running online with 4 pages
4- Contact us
and i want to do some work on page 1 'Products', i want meanwhil i m working on page if user access that page a message should be displayed 'page under process or anything', how i do this ?
Any Help ?
If I understand it correctly you are trying to show a warning message when user have unsaved data and navigate away from page?
Try this plugin http://www.apex-plugin.com/oracle-apex-plugins/dynamic-action-plugin/skillbuilders-save-before-exit_43.html
you could make a dummy HTML region with the text "page under process or anything" that will only show based on the condition that the logged in user, using the substitution variable APP_USER, is NOT your user account.
After you are done set the condition for the region to none.