basically do this:
<?
$limit_to = 5;
if (!isset($page)){$page=1;}
$curr_index = ($limit_to * $page) - $limit_to;
$query = "SELECT * FROM table LIMIT $curr_index, $limit_to"
?>
<a href="$PHP_SELF?page=<?=$pg-1?>">back</a> - <a href="$PHP_SELF?page=<?=$pg+1?>">forward</a>