/**
  * 
  * Enter description here ...
  * @param unknown_type $form
  */
 public static function isAllowed($form)
 {
     $session = Session::getInstance();
     switch ($session->userlevel) {
         case ADMIN_LEVEL:
             return true;
         case USER_LEVEL:
             return Forms::isUserAllowed($form);
         case CASH_LEVEL:
             return Forms::isCashAllowed($form);
         case SELLS_LEVEL:
             return Forms::isSellsAllowed($form);
     }
     return false;
 }