内容涉及：php、分页、jquery、div+css
实例下载：http://download.csdn.net/detail/roro5119/7373905
index.php
<?
//数据库配置文件
include("conn.php");
//默认搜索
$page = $_GET["page"] ? $_GET["page"] : 1;
$pagesize = 20;
$pageval = ($page-1)*20; $sql="select `pic` from `mypic` limit $pageval,$pagesize";
$query = mysql_query($sql);
?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<script src="http://files.cnblogs.com/tinyphp/jquery-1.3.2.min.js"></script>
<link rel="stylesheet" href="page.css">
<title>延迟加载</title>
</head>
<style type="text/css">
.showbox{ width:1000px; margin:0 auto;}
.showbox img{ padding:5px; background:#CCCCFF;}
.add-more{ width: 1000px; background: yellow;height: 100px; line-height: 30px; text-align: center; margin: 0 auto; display: none;}
</style>
<body>
<div class="showbox">
<?
while($row=mysql_fetch_array($query)){
?>
<img src="<?=$row["pic"];?>" alt="" width="200" height="200">
<?
}
?>
</div>
<!--数据加载提示，默认隐藏-->
<div class="add-more">数据正在加载...</div>
<!--js部分-->
<script type="text/javascript"> $(function(){
var downrange = 100; //下边界-参考正在加载提示层/px
var num = <?=$page;?>; //初始页码
var maxnum = num+5; //设置加载次数
var $main = $(".showbox"); //主体
var $loaddiv = $(".add-more") //加载提示层
var totalheight = 0;
//判断是否需要异步
function ifLoad(){
//滚动条距离顶部距离
var scrolltotop=parseFloat($(window).scrollTop());
//窗口高度
var winheight = parseFloat($(window).height());
//内容总高度
var conheight = parseFloat($(document).height())-downrange;
//总高度
totalheight = scrolltotop + winheight; //判断是否加载，当操作高度比内容大，空间充裕->加载
if(totalheight >= conheight && num!=maxnum){
ajaxLoad(num);
num++;
} } //ajax-fun
function ajaxLoad(page){
$.ajax({
url:"ajax.php",
type:"post",
data:{page:page,maxnum:maxnum},
success:function(result){
//追加数据
$main.append(result);
}
})
} //加载中隐藏显示
$loaddiv.ajaxStart(function(){
$(this).show();
}).ajaxStop(function(){
$(this).hide();
}) //scroll-fun
$(window).scroll(ifLoad); })
</script> </body>
</html>
异步文件：
<?
//数据库配置文件
include("conn.php"); //每页显示信息
$pagesize=20; //最大加载次数
$maxnum = $_POST["maxnum"]-1; //从哪里开始
$page=$_POST["page"];
$nextpagestart = $page*$pagesize; $sql = "select `pic` from `mypic` limit $nextpagestart,$pagesize";
$query =mysql_query($sql);
while($row = mysql_fetch_array($query)){
//内容
?>
<img src="<?=$row["pic"];?>" alt="" width="200" height="200">
<?
} //分页
if($page ==$maxnum){
include('page.class.php');
$sqlsum = "select `id` from `mypic`";
$querysum = mysql_query($sqlsum); //数据总数
$total = mysql_num_rows($querysum);
//参数对应位置：总记录，每页显示的条数，当前页，连接的地址
$my_page=new PageClass($total,$pagesize,$page,'?page={page}');
//输出页码
echo $my_page->myde_write();
exit;
}
?>