จะดึงข้อมูล จากหน้าสุดท้าย ขึ้นมาแสดงก่อนจะทำอย่างไรครับ (ตอนนี้มันดึงจากหน้าแรกอะครับ)

<?
	$host     = "localhost";
	$username = "root";
	$password = "1234";
	$db       = "data_tolovemore";
	
	@mysql_connect($host, $username, $password) or die("MySQL Connection Failed");
	@mysql_select_db($db) or die("MySQL Select Database Failed");
	mysql_query("SET NAMES utf8") or die(mysql_error());
	mysql_query("SET character_set_results=tis620");
	mysql_query("SET character_set_client=tis620");
	mysql_query("SET character_set_connection=tis620");
//	Prepare Variables
	//	Page Size
$num_col   = 3;
$num_row   = 15;
$page_size = $num_col*$num_row;

	//	Page No
$page_no = isset($_REQUEST["page_no"]) ? $_REQUEST["page_no"] : 0;

	//	Number of Product
$sql         = "SELECT COUNT(*) FROM product";
$result      = mysql_query($sql) or die(mysql_error());
$row         = mysql_fetch_array($result);
$num_product = $row["COUNT(*)"];

	//	Number of Page
$num_page = ceil($num_product/$page_size);

	//	Start Record
$start_record = $page_no*$page_size;
            
//	Action
$sql    = "SELECT * FROM product"
		  . " ORDER BY id"
		  . " LIMIT $start_record, $page_size";
$result = mysql_query($sql) or die(mysql_error());
?>