Next and previous

<div id="main">

            <?php // Include the WordPress loop file
            include ( TEMPLATEPATH . '/includes/loop.php' );
            ?>

            <div class="navigation">
            <div class="alignleft">
            <?php previous_post('&laquo; %',
             'Previous: ', 'no'); ?>
            </div>
            <div class="alignright">
            <?php next_post('% &raquo; ',
             'Next: ', 'no'); ?>
            </div>
            </div> <!-- end navigation -->

        </div><!--main-->