function &getQuestion($question_type)
 {
     static $objs, $question_classes;
     if (isset($objs[$question_type])) {
         return $objs[$question_type];
     }
     $question_classes = TestQuestions::getQuestionClasses();
     if (isset($question_classes[$question_type])) {
         global $savant;
         $objs[$question_type] = new $question_classes[$question_type]($savant);
     } else {
         return FALSE;
     }
     return $objs[$question_type];
 }