the paging is controlled by querystring variables:
?pageNum_WADAProducts=1&totalRows_WADAProducts=12
These would need to be added to the update link on the results page:
<input type="button" name="product_update" id="product_update" value="Update" class="ie_btn_small" onclick="window.location = 'Products_Update.php?ProductID=<?php echo(rawurlencode($row_WADAProducts['ProductID'])); ?><?php echo(isset($_GET['pageNum_WADAProducts'])?"&pageNum_WADAProducts=".$_GET['pageNum_WADAProducts']:""); ?><?php echo(isset($_GET['totalRows_WADAProducts'])?"&totalRows_WADAProducts=".$_GET['totalRows_WADAProducts']:""); ?>';" /><br />
to the forms action on the update page:
action="Products_Update.php?ProductID=<?php echo(rawurlencode($row_WADAProducts['ProductID'])); ?><?php echo(isset($_GET['pageNum_WADAProducts'])?"&pageNum_WADAProducts=".$_GET['pageNum_WADAProducts']:""); ?><?php echo(isset($_GET['totalRows_WADAProducts'])?"&totalRows_WADAProducts=".$_GET['totalRows_WADAProducts']:""); ?>"
and to the redirect:
$WA_redirectURL = "Products_Results.php?ProductID=".((isset($_POST["WADAUpdateRecordID"]))?$_POST["WADAUpdateRecordID"]:"") ."".((isset($_GET["pageNum_WADAProducts"]))?"&pageNum_WADAProducts=".$_GET["pageNum_WADAProducts"]:"") ."".((isset($_GET["totalRows_WADAProducts"]))?"&totalRows_WADAProducts=".$_GET["totalRows_WADAProducts"]:"") ."";