else if($orderby=="lastpost") {

$ordersql = "  ORDER BY arc.lastpost $orderWay";

}

else if($orderby=="lastpost") {

            $ordersql = "  ORDER BY arc.lastpost $orderWay";

        }

       else if($orderby=="weight") {

            $ordersql = "  ORDER BY arc.weight $orderWay";

        }

 //如果不用默认的sortrank或id排序，使用联合查询（数据量大时非常缓慢）

        if(preg_match('/hot|click|lastpost/', $orderby))

//如果不用默认的sortrank或id排序，使用联合查询（数据量大时非常缓慢）

   　 if(preg_match('/hot|click|lastpost|weight/', $orderby))

$query = "SELECT id FROM `dede_arctiny` arc WHERE {$this->addSql} $ordersql LIMIT $limitstart,$row ";

$query = "SELECT id FROM `dede_archives` arc WHERE {$this->addSql} $ordersql LIMIT $limitstart,$row ";

{dede:list orderby='weight' pagesize ='3'}

{/dede:list}