มีเรื่องให้ช่วยหน่อยครับ ช่วยแก้ส่วนนี้ให้ผมหน่อยผมไม่ค่อยเก่งครับ มือใหม่มาก

<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
<script>
$(function(){

	$('#return_item').click(function(){
		var returnedMsg = "คืนแล้ว";
		var des = $(this).attr("href");
		$.get(des, function(data){
			if(data == 'ok'){
				$('#return_button').html(returnedMsg);
			} else {
				alert('Error!');
			}
		});
		return false;
	});

});
</script>
<?php

$Total = 0;
  $SumTotal = 0;
  $TaxTotal = 0;
  $SssTotal = 0;

$strSQL2 = "SELECT * FROM order_detail WHERE Or_id = '".$_GET["Or_id"]."' ";
$objQuery2 = mysql_query($strSQL2)  or die(mysql_error());

while($objResult2 = mysql_fetch_array($objQuery2))
{
		$strSQL3 = "SELECT * FROM product WHERE Pd_id = '".$objResult2["Pd_id"]."' ";
		$objQuery3 = mysql_query($strSQL3)  or die(mysql_error());
		$objResult3 = mysql_fetch_array($objQuery3);
		$Total = $objResult2["Qty"] * $objResult3["Pd_price"];
		$SumTotal = $SumTotal + $Total*1.07;
		$TaxTotal = $TaxTotal + $Total*0.07;
		$SssTotal = $SssTotal + $Total;
	  ?>
	  <tr>
		<td><?php echo $objResult2["Pd_id"];?></td>
		<td><img src="images all/product/<?php echo $objResult3['Pd_img']; ?>" width="128" height="94"></td>
		<td><?php echo $objResult3["Pd_name"];?></td>
		<td><?php echo $objResult3["Pd_price"];?></td>
		<td><?php echo $objResult2["Qty"];?></td>
		<td><?php echo number_format($Total,2);?></td>
        <?php $Pd_id = $objResult2["Pd_id"];
		$Qty = $objResult2["Qty"]; ?>
		<td id="return_button"><a id="return_item" href="deleteOrderProduct.php?Pd_id=<?php echo $objResult2["Pd_id"]; ?>&Qty=<?php echo $objResult2["Qty"]; ?>" >คืน</a></td>
	  </tr>
	  <?php
 }
  ?>

<?php require_once('Connections/Connect1.php');

$sql = "Update product Set item = item+".$_GET['Qty']." Where Pd_id=".$_GET['Pd_id']."";
$mysql_query($sql);
if(mysql_affected_rows()>0){
	echo "ok";
}

?>