How to Call DMSGuestbook on Article Pages

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<?php if (have_posts()) : while (have_posts()) : the_post(); ?><?php the_content(''); ?>
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<?php endwhile; endif; ?>

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<div><?php if (have_posts()) : while (have_posts()) : the_post(); ?></div>
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<div><?php the_content(''); ?></div>
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<div><?php endwhile; endif; //Normal call for page content?></div>
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<div><?php DMSGuestbook("$id"); //Use DMSGuestbook() function to call guestbook or comments on the page, id is the page id ?></div>