drupal_set_message(t('Not enough random questions were found. Please add more questions before trying to take this @quiz.',array('@quiz'=>QUIZ_NAME)),'error');
drupal_set_message(t('Not enough random questions were found. Please !add more questions before trying to take this @quiz.',
array('@quiz'=>QUIZ_NAME,'!add more questions'=>l('add more questions','node/'.arg(1).'/questions'))),'error');