Trying to create a page that when you click a icon it reload the page but adds code to the page, then click it again and it removes the code. Example Click help icon on page, reloads and help screen is inserted, press help icon again and it disappears
if ( param('help') eq 'show' ) { print '-- HELP SCREEN HERE --<br><a href="script.pl">hide help screen</a>'; } else { print '<a href="script.pl?help=show">show help screen</a>'; }