ขอสอบถามโค้ด หมวดสินค้า และมีสินค้าย่อย หน่อยครับ ขอบคุณครับ

<? $SelectCat=Select("ecom_category","");
   $NoCat=0;
   while($CatMenu=mysql_fetch_array($SelectCat)){   
   $NoCat++;
?>

<a href="product.php?Act=Category&CatId=<?=$CatMenu['CatId'];?>"><? echo "".$CatMenu['CatName']; ?></a>
 <? } ?>

<?

	$Act=$_GET['Act'];
	switch($Act){
		case 'Category'	:	$Act=$_GET['Act'];
								$CatId=$_GET['CatId'];
								$Search=$_GET['Search'];
								
								$SelectCat=Select("ecom_category","WHERE CatId='".$CatId."'");
								$Cat=mysql_fetch_array($SelectCat);
								$Title="PRODUCT : ".$Cat['CatName'];
								
								$Table="ecom_product";
								$Condition="WHERE CatId='".$CatId."'AND Quanlity > 0 AND ProductName LIKE '%".$Search."%'";
								
								$Hidden="<input type=\"hidden\" name=\"Act\" value=\"$Act\"><input type=\"hidden\" name=\"CatId\" value=\"$CatId\">";	
								
								$PageDetail="&Act=".$Act."&CatId=".$CatId."&Search=".$Search;
		break;
		case 'Product'	:	 $Act=$_GET['Act'];
								$Search=$_GET['Search'];
								
								$Title="TOTAL PRODUCT";
								
								$Table="ecom_product";
								$Condition="WHERE ProductName LIKE '%".$Search."%'AND Quanlity > 0";
								
								$Hidden="<input type=\"hidden\" name=\"Act\" value=\"$Act\">";
								
								$PageDetail="&Act=".$Act."&Search=".$Search;
		break;
		case 'New'	:		 $Act=$_GET['Act'];
								$New=$_GET['New'];
								$Search=$_GET['Search'];
								
								$Title="NEW PRODUCTS";
								
								$Table="ecom_product";
								$Condition="WHERE New='".$New."'AND Quanlity > 0 AND ProductName LIKE '%".$Search."%'";
								
								$Hidden="<input type=\"hidden\" name=\"Act\" value=\"$Act\"><input type=\"hidden\" name=\"New\" value=\"$New\">";
								$PageDetail="&Act=".$Act."&New=".$New."&Search=".$Search;
		break;
		case 'Promotion':	   $Act=$_GET['Act'];
								$Promotion=$_GET['Promotion'];
								$Search=$_GET['Search'];
								
								$Title="PROMOTION PRODUCT";
								
								$Table="ecom_product";
								$Condition="WHERE Promotion='".$Promotion."'AND Quanlity > 0 AND ProductName LIKE '%".$Search."%'";
								
								$Hidden="<input type=\"hidden\" name=\"Act\" value=\"$Act\"><input type=\"hidden\" name=\"Promotion\" value=\"$Promotion\">";
								
								$PageDetail="&Act=".$Act."&Promotion=".$Promotion."&Search=".$Search;
		break;
		case 'ProductSearch' :  $Act=$_GET['Act'];
								$CatId=$_GET['CatId'];
								$New=$_GET['New'];
								$Promotion=$_GET['Promotion'];
								$ProductName=$_GET['ProductName'];
								
								$Title="Search Products";
								
								if($CatId != ''){
									$CatIdSearch="CatId='".$CatId."'";	
								}else{
									$CatIdSearch="CatId LIKE '%".$CatId."%'";	
								}
								
								if($New != ""){
									$NewSearch="New='".$New."'";	
								}else{
									$NewSearch="New LIKE '%".$New."%'";	
								}
								
								if($Promotion != ""){
									$PromotionSearch="Promotion='".$Promotion."'";
								}else{
									$PromotionSearch="Promotion LIKE '%".$Promotion."%'";	
								}
						
								
								$Table="ecom_product";
								$Condition="WHERE $CatIdSearch AND Quanlity > 0 AND $NewSearch AND $PromotionSearch AND ProductName LIKE '%".$ProductName."%'";
								
								$Hidden="";
								$PageDetail="&Act=".$Act."&CatId=".$CatId."&New=".$New."&Promotion=".$Promotion."&ProductName=".$ProductName;
	break;
	}		

?>