# if using CGI.pm to generate output try: print $query->header( -type => 'text/html', -expires => '-1d', -Pragma => 'no-cache', -Cache-control => 'no-cache'); I have try up the code but problem is it still loading the page when i press the back button. The page only expired when that particular page haven't finish 100% loaded and i press other link, then i press the back button the expired page then only will show. Else the page 100% finish loaded then click to another webpage link and i press back, the page didn't expires. Anyone Have suggestion can please help me. thank you