function hasRight($right){
if(empty($right)){
return TRUE;
}else{
if($this->_user_rights == NULL)
$this->_user_rights = SI_UserRight::getRightsForUser($this->id);
for($i = 0; $i < count($this->_user_rights); $i++){
if($this->_user_rights[$i]->user_right == $right)
return $this->_user_rights[$i]->right_value;
}
}
}
