<div id="sidebar1" class="sidebar right col300 last clearfix" role="complementary">

<?php if ( is_active_sidebar( 'sidebar1' ) ) : ?>

<?php dynamic_sidebar( 'sidebar1' ); ?>

<?php else : ?>

<!-- This content shows up if there are no widgets defined in the backend. -->

<div class="help">

<p>Please activate some Widgets.</p>

</div>

<?php endif; ?>

</div>