public static function isChildBusiness_product($ProductId, $ChildProductId)
 {
     $ischild = false;
     $obj_retResult = DAL_manageBusiness_product::getBusiness_productListByProductId($ChildProductId);
     //get child node
     if ($obj_retResult->type == 1) {
         $arr_Business_productList = $obj_retResult->data;
         $obj_Business_product = $arr_Business_productList[0];
         $arrParentIds = explode(",", $obj_Business_product->Url);
         foreach ($arrParentIds as $Business_productParentId) {
             if ($Business_productParentId == $ProductId) {
                 $ischild = true;
             }
         }
     }
     return $ischild;
 }