Can you ID this template mod code?

[Grunt]

im doing some work on a skin that i downloaded; i found this in the phpinclude and wondering if anyone could ID the modification that it is 'using'?

if (strpos($_SERVER['PHP_SELF'], "index.php") != false)
{
	function cutit($s, $threshold)
	{
		if (strlen($s) > $threshhold)
		{
			return substr($s, 0, $threshold) . "...";
		}
		else return $s;
	}

	$result = $DB_site->query("SELECT forum.forumid AS forumid, thread.threadid AS threadid, thread.title AS title
		FROM forum
		LEFT JOIN thread ON (thread.forumid = forum.forumid AND thread.lastpost = forum.lastpost)
		WHERE displayorder <> 0 AND active = 1 AND thread.title <> \"\"");
	
	$shash = $session['sessionhash'];
	define("LASTPOST_ARRAYBIT", "if (document.all['lasttitle[forumid]'])
		lasttitle[forumid].innerHTML = \"<a href=\\\"showthread.php?s=$shash&threadid=[threadid]\\\">[title]</a>\";");
	$findbits = array("[forumid]", "[threadid]", "[title]");

	$jslines = array();
	while ($bits = $DB_site->fetch_array($result)) // single equals sign intended
	{
		$lastthreadid = $bits['threadid'];
		$lasttitle = addslashes(cutit($bits['title'], 20));
		$lastforumid = $bits['forumid'];
		
		$replacebits = array($lastforumid, $lastthreadid, $lasttitle);
		array_push($jslines, str_replace($findbits, $replacebits, LASTPOST_ARRAYBIT));
	}
	$jslines = implode("\n", $jslines);
}