สอบถามปปัญหาเรื่องการแสดงสินค้าให้มีหน้าถัดไปแสดงสินค้านได้เยอะ

<? session_start(); ?>
<style type="text/css">
<!--
.style13 {color: #000000; font-size: 12px; }
-->
</style>



<p>&nbsp;</p>
<table width="100%" border="0" cellpadding="10" cellspacing="0">
<?
include("config.inc.php");
$sql="select * from product where prd_new= 1  order by rand() ";
$result=mysql_db_query($db,$sql);
$c=1;
while($rs=mysql_fetch_array($result)){
	$pr_id=$rs[pr_id];
	$pr_name=$rs[pr_name];
	$pr_images=$rs[pr_images];
	$pr_pricesale=$rs[pr_pricesale];

		
$a=$pr_pricesale;
$b=number_format($a);


		if($c==1){
		echo "<tr>";
		}
	echo "<td align='center' width='30%' height='40%'><br><a href='index_detail.php?pagelink=product_detail&pr_id=$pr_id'><img src='admin/uploadfile/$pr_images' width='80' height='80' border='0' alt='$pr_name'></a><br>
		<a href='index_detail.php?pagelink=product_detail&pr_id=$pr_id'>$pr_name<br></a></font><b>$b.00 ºÒ·</b><br><br></td>";
	if($c==3){
		echo "</tr>";
		$c=0;
		}
	$c++;
}
?></table>