<?php
$page=$_GET[page];
$maxnum='10';
if(empty($page))
                    {
                      $page=1;
                     }
        $startnum = ($page - 1)*$maxnum;   
                 $mysqli=new my_db;
                 $row = $mysqli->select("SELECT * FROM tb_computer  ORDER BY id DESC limit $startnum,$maxnum ");?>------------------------------------------------------------------------------------
每个页面前面都要加上这个 
$page=$_GET[page];
$maxnum='10';
if(empty($page))
                    {
                      $page=1;
                     }
        $startnum = ($page - 1)*$maxnum;
感觉好乱 大家有什么好的方法没?