if ( empty( $url ) || 'http://' == $url )
$return = $author;
else
$return = "<a href='$url' rel='external nofollow' class='url'>$author</a>";
return apply_filters('get_comment_author_link', $return);
}

if ( empty( $url ) || 'http://' == $url )
$return = $author;
else
$return = "<a href='$url' rel='external nofollow' class='url' target='_blank'>$author</a>";
return apply_filters('get_comment_author_link', $return);
}