function chkans($qid, $ansid)
 {
     $_SESSION['currentqkey']++;
     $db = new MYSQLDB();
     if ($db->iscor($qid, $ansid)) {
         $_SESSION['corcount']++;
     }
     if ($_SESSION['currentqarray'][$_SESSION['currentqkey']] == end($_SESSION['currentqarray'])) {
         $_SESSION['isEndOfExam'] = true;
     }
 }