Update line 371 from:
<div class="WADAResultTitle"><a href="products_detail.php?ID=<?php echo($row_WADAproducts['ID']); ?>" ><?php echo(isset($_GET["pageNum_WADAproducts"])?"&pageNum_WADAproducts=".intval($_GET["pageNum_WADAproducts"]):""); ?>
to:
<div class="WADAResultTitle"><a href="products_detail.php?ID=<?php echo($row_WADAproducts['ID']); ?><?php echo(isset($_GET["pageNum_WADAproducts"])?"&pageNum_WADAproducts=".intval($_GET["pageNum_WADAproducts"]):""); ?>" >