使用AJAX實現(xiàn)分頁

!DOCTYPE html>
html>
head>
  title>分頁/title>
/head>
script type="text/javascript">
/**
* AJAX
* 1.創(chuàng)建ajax對象
* 2.建立連接
* 3.判斷ajax準備狀態(tài)及狀態(tài)碼
* 4.發(fā)送請求
*/
function showList(pageNow){

  //創(chuàng)建ajax對象
  var xmlHttp = new XMLHttpRequest();

  //建立連接
  xmlHttp.open('get','./AJAX_Fenye.php?pageNow='+pageNow);

  //判斷ajax準備狀態(tài)及狀態(tài)碼
  xmlHttp.onreadystatechange = function(){

    if (xmlHttp.readyState == 4  xmlHttp.status == 200) {
      //alert(xmlHttp.readyState);
      document.getElementById('result').innerHTML = xmlHttp.responseText;
    }
  }

  //發(fā)送請求
  xmlHttp.send(null);
}

//默認顯示第1頁
window.onload = function(){

  showList(1);
}

/script>
body>
input type="text">
div id="result">
  !-- 此處顯示信息！ -->
/div>
/body>
/html>

!DOCTYPE html>
html>
head>
meta charset="UTF-8">
title>AJAX分頁/title>
/head>
body>

?php 
//以下php代碼可封裝調用，參數(shù)為pageNow


//鏈接數(shù)據(jù)庫
@mysql_connect('localhost','root','');
@mysql_select_db('empmanage');
@mysql_query('set name utf8');

//獲取總記錄數(shù)
$rs = mysql_query('select count(*) from emp');
$rows = mysql_fetch_row($rs);
$recordCount = $rows[0];

//每頁顯示多少條pageSize
$pageSize = 5;

//總頁數(shù) = 總記錄/每頁顯示多少
$pageCount=ceil($recordCount/$pageSize);

//獲取當前頁 三元運算 若不存在pageNow則默認顯示第1頁
$pageNow = isset($_GET['pageNow'])? $_GET['pageNow']:1;

if ($pageNow  1) {
  $pageNow = 1;
}elseif ($pageNow > $pageCount) {
  $pageNow = $pageCount;
}

//起始位置 每頁從第幾條數(shù)據(jù)顯示
$pageStart = ($pageNow-1)*$pageSize;

//從哪條開始顯示，限制每頁顯示幾條
$sql = "select * from emp limit $pageStart,$pageSize";

//鏈接數(shù)據(jù)庫
$rs = mysql_query($sql);

//以上php代碼可封裝調用，參數(shù)為pageNow 返回查詢到的數(shù)據(jù)$rs

 ?>

 table bordercolor="green" border="1">
   tr>
     th>ID/th>
     th>姓名/th>
     th>郵箱/th>
     th>等級/th>
   /tr>

?php 
//循環(huán)取出數(shù)據(jù)
while ($rows = mysql_fetch_assoc($rs)) { 
echo "
    tr>
      td>{$rows['id']}/td>
      td>{$rows['name']}/td>
      td>{$rows['email']}/td>
      td>{$rows['level']}/td>
     /tr>
  ";
}
?>
 tr>
   td colspan='4'>
   ?php
     //分頁頁碼 調用js中的showList()方法 此處$i=$pageNow
       for ($i=1; $i = $pageCount; $i++) { 
         echo "a href = 'javascript:void(0)' onclick = 'showList($i)'>{$i}/a> nbsp;";
       }
   ?>
   /td>
 /tr>
 /table>

/body>
/html>