Stuff

<?php

// in the loop
			echo '<form name="post_deleter" method="post" action="">';
			echo '<input type="hidden" name="Post_to_delete" value="'.$post_id[].'">';
			echo '<input type="submit" name="TopicDelete" value="Delete">';
			
?>

<?php

// out of the loop

if($_POST['TopicDelete'] && $_POST['Post_to_delete'] !='')
	{
	$query = "DELETE FROM ... WHERE `topic_id` = $_POST['Post_to_delete']";
	}

?>