Request to change mark in 21<title> <meta http-equiv="Refresh" content="2; URL="> </head> <body> <h2 align=center>Changing mark in 21: succeeded</h2> <center>All entries in tag no 21 reset to unmarked. </center> <center> <i>you should be redirected back to the calling page</i> <br> otherwise <a href=""></a> </center> </body> </html>