ขอความช่วยเหลือเกี่ยวกับ link คือ กรณีแสดงผลโดย code แบ่งหน้า จากการเรียกใช้ข้อมูล 3 ตาราง

<? include("connection.php"); ?>
<? include("header.php"); ?>
<?php
$strSQL = "SELECT * FROM product where typecode = '$tcode'";
$objQuery = mysql_query($strSQL);
$Num_Rows = mysql_num_rows($objQuery);

$Per_Page = 6;   // Per Page แสดงต่อ page

$Page = $_GET["Page"];
if(!$_GET["Page"])
{
	$Page=1;
}

$Prev_Page = $Page-1;
$Next_Page = $Page+1;

$Page_Start = (($Per_Page*$Page)-$Per_Page);
if($Num_Rows<=$Per_Page)
{
	$Num_Pages =1;
}
else if(($Num_Rows % $Per_Page)==0)
{
	$Num_Pages =($Num_Rows/$Per_Page) ;
}
else
{
	$Num_Pages =($Num_Rows/$Per_Page)+1;
	$Num_Pages = (int)$Num_Pages;
}
// code แบ่งหน้า
$sql="select product.productcode, product.productmodel, product.productname, product.productdetail, product.productpdf, product.productpicture, brand.brandname, type.typename from product , brand , type where product.typecode = type.typecode and product.brandcode = brand.brandcode and product.typecode = '$tcode' order by productcode  LIMIT $Page_Start , $Per_Page ";
$result = mysql_db_query($dbname, $sql);
$num=mysql_num_rows($result );

if ($num>0) {
echo "<table border=1 cellpadding=5 cellspacing=5 bordercolor='#425452' background='images/bg5.gif'>";
$check=1;
while($rs=mysql_fetch_array($result)) {
$productcode=$rs[productcode];
$productcode=sprintf("%05d",$productcode);
$productmodel=$rs[productmodel];
$productname=$rs[productname];
$productdetail=$rs[productdetail];
$productpdf=$rs[productpdf];
$brandname=$rs[brandname];
$typename=$rs[typename];
$productpicture=$rs[productpicture];

if ($productpicture==" ") {
$productpicture="nopic.gif";
}

if ($check%2 == 1) {
echo "<tr>";
}
echo "
<td width='10%' valign='center'>
<img src='product/$productpicture' border='0' width=120 height=120>
</td>
<td width='30%'   valign='top' class=textstyle> 
<Font  color='#0000FF'>รหัส : <Font  color='#0000FF'>$productcode<br>
<Font  color='#0000FF'>Model : <Font  color='#0000FF'>$productmodel<br>
<Font  color='#0000FF'>ชื่อสินค้า : <Font  color='#000000'>$productname<br>
<Font  color='#0000FF'>ยี่ห้อสินค้า : <Font  color='#000000'> $brandname <br>
<Font  color='#0000FF'>ประเภท : <Font  color='#000000'> $typename <br>
<Font  color='#0000FF'>รายละเอียด :  <Font  color='#000000'>$productdetail <br>
<Font  color='#0000FF'>ไฟล์ PDF :  <Font  color='#000000'><a href='product/$productpdf' target='_blank'>Download</a><br>
<br>
</td>";
if ($check%2==0) {
echo "</tr>";
$check=0;
}
$check++;
}
echo "</table>";
}
?>
<!--แสดง linkแบ่งหน้า  -->
<? echo"<span class='textstyle'>"; ?>
Total
      <?= $Num_Rows;?>&nbsp;
Record :
<?=$Num_Pages;?> 
 Page :
<?
if($Prev_Page)
{
	echo " <a href='$_SERVER[SCRIPT_NAME]?Page=$Prev_Page'><< Back</a> ";
}

for($i=1; $i<=$Num_Pages; $i++){
	if($i != $Page)
	{
		echo "[ <a href='$_SERVER[SCRIPT_NAME]?Page=$i'>$i</a> ]";
	}
	else
	{
		echo "<b> $i </b>";
	}
}
if($Page!=$Num_Pages)
{
	echo " <a href ='$_SERVER[SCRIPT_NAME]?Page=$Next_Page'>Next>></a> ";
}
mysql_close();
?>
</table>
</td>
</tr>
</table>
</form>
<? include("footer.php"); ?>