function theme_user_login_link($attributes, $query) {
  $attributes['class'] = $attributes['class'].' gomodal';
  $img = '<img src="'.$base_path .$directory . '/images/login_key.png" />';
  $login_uri = l($img, 'modal/login', array('attributes'=>$attributes, 'query'=>$query));
  return $login_uri;
}