分页

<div class="gl_fenye">
<span id="shang">上一页</span>
<span id="xia">下一页</span>
<span>当前第：<input type="text" id="dq" value="1" style="50px;"/>页</span>
<span>总共：<span id="zys"></span>页</span>
</div>

$("#shang").click(function(){
            var dq = parseInt($("#dq").val());
            if(dq>1)
            {
                $("#dq").val(dq-1);
            }
            else
            {
                $("#dq").val(1);
            }
            A();
        })
    //下一页
    $("#xia").click(function(){
            var dq = parseInt($("#dq").val());
            if(dq<$("#zys").text())
            {
                $("#dq").val(dq+1);
            }
            else
            {
                $("#dq").val($("#zys").text());
            }
            A();
        })    
           ZYS(2);
           function ZYS(n)
           {
            $.ajax({
                url:"zong.php",
                data:{list:n},
                type:"POST",
                dataType:"TEXT",
                success: function(data)
                {
                    $("#zys").text(data);
                    }
                });
           }
 

function A(){
    var dq = $("#dq").val();    
    $.ajax({
        async:false,
        url:"guanlichuli.php",
        dataType:"TEXT",
        data:{page:dq},
        type:"GET",
        success: function(data)
        {
           var str="<tr style='font-size:15px;'><td>用户名</td><td>密码</td><td>状态</td><td>角色</td><td>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;操作</td></tr>";
           var s = "";
           var hang=data.split("|"); 
           for (var i=0; i<hang.length;i++ )
           {
               var lie= hang[i].split("^");
               if(hang.length==1)
               {
                     a="普通用户";
                     b="<input type='button' value='修改' class='upd' isok='"+lie[0]+"' style='background:#0C6;'/>";
                 } 
                else{ 
                if (lie[5]==0)
                {
                    if(lie[3]==1)
                    {
                     a="普通用户";
                     b="<input type='button' value='删除' class='del' isok='"+lie[0]+"'>&nbsp;&nbsp;<input type='button' value='修改密码' class='upd' isok='"+lie[0]+"' />&nbsp;&nbsp;<input type='button' value='停用' class='ting' isok='"+lie[0]+"'>";
                }
                else{
                     a="普通用户";
                     b="<input type='button' value='删除' class='del' isok='"+lie[0]+"'/>&nbsp;&nbsp;<input type='button' value='修改密码' class='upd' isok='"+lie[0]+"' />&nbsp;&nbsp;<input type='button' value='解锁' class='jiesuo' isok='"+lie[0]+"'/>";
                    }
                }
                }
                if (lie[5]==2)
                {
                $("#tianjia").css('display','block');    
                 a="超级管理员";
                 b="";
                }
                var zt=lie[3]==true?"正常":"已锁定";
               var s=s+"<tr bgcolor='#FFF' style='font-size:13px;'><td>"+lie[1]+"</td><td>"+lie[2]+"</td><td>"+zt+"</td><td>"+a+"</td><td>"+b+"</td>";
           }
           str = str + s;
           $("#xianshi").html(str);
           
}

<?php
session_start();
$uid = $_SESSION["uid"];
include("../public/page.class.php");
include("../public/DBDA.class.php");
$db=new DBDA();
$sql = "select count(*) from z_users";
$zs = $db->StrQuery($sql);

$page = new Page($zs,2);

$sql1="select z_authority from z_users where z_uid='{$uid}'";
$juese = $db->StrQuery($sql1);
if($juese==0)
{
    $sql2="select * from z_users where z_uid='{$uid}' ".$page->limit;
    $attr2 = $db->StrQuery($sql2);
    echo $attr2;
    }
else{
$sql="select * from z_users ".$page->limit;
$attr = $db->StrQuery($sql);
echo $attr;
}

<?php
include("../public/DBDA.class.php");
$db = new DBDA();

$sql ="select count(*) from z_users";
$sj = $db->StrQuery($sql);

$list = $_POST["list"];

$zys = 0;
if($sj%$list==0)
{
    $zys = $sj/$list;
}
else
{
    $zys = floor($sj/$list) +1;
}

echo $zys;