quiz secure mode: MDL-22724 missing attempt quiz button if browser se…

…curity is enable.

Thanks to Rossiani Wijaya for finding and fixing this.

mod/quiz/accessrules.php

@@ -731,7 +731,7 @@ public function print_start_attempt_button($buttontext, $strconfirmstartattempt)
             $attempturl = $SESSION->sid_process_url($attempturl);
         }
 
-        echo '<input id="quizstartbuttondiv" type="button" value="' .
+        echo '<input id="quizstartbutton" type="button" value="' .
                 s($buttontext) . '" style="display: none;" onclick="javascript:';
         if ($strconfirmstartattempt) {
             echo "if (confirm('" . addslashes_js($strconfirmstartattempt) . "')) ";