Display pagination if have are child pages

<?php
$pagelist = get_pages("child_of=".$post->post_parent."&parent=".$post->post_parent."&sort_column=menu_order&sort_order=asc");
$pages = array();
foreach ($pagelist as $page) {
   $pages[] += $page->ID;
}
$current = array_search($post->ID, $pages);
$prevID = $pages[$current-1];
$nextID = $pages[$current+1];
?>
<div class="nav-links">
<?php if (!empty($prevID)) { ?>
<div class="nav-previous">
<a href="<?php echo get_permalink($prevID); ?>" title="<?php echo get_the_title($prevID); ?>"><?php echo get_the_title($prevID); ?></a>
</div>
<?php }
if (!empty($nextID)) { ?>
<div class="nav-next">
<a href="<?php echo get_permalink($nextID); ?>" title="<?php echo get_the_title($nextID); ?>"><?php echo get_the_title($nextID); ?></a>
</div>
<?php } ?>
</div>
    </div>