<!doctype html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>jquery scrolling</title>
<link rel="stylesheet" href="css/style.css"/>
</head>
<body>
<!--imgbox-->
<div class="wrapper">
<div class="img-box">
<img src="img/1.png" />
</div>
<div class="img-box">
<img src="img/2.png" />
</div>
<div class="img-box">
<img src="img/3.png" />
</div>
<div class="img-box">
<img data-url="img/4.png" src="img/pix.png" />
</div>
<div class="img-box">
<img data-url="img/5.png" src="img/pix.png" />
</div>
<div class="img-box">
<img data-url="img/6.png" src="img/pix.png" />
</div>
<div class="img-box">
<img data-url="img/7.png" src="img/pix.png" />
</div>
<div class="img-box">
<img data-url="img/8.png" src="img/pix.png" />
</div>
<div class="img-box">
<img data-url="img/9.png" src="img/pix.png" />
</div>
<div class="img-box">
<img data-url="img/10.png" src="img/pix.png" />
</div>
<div class="img-box">
<img data-url="img/11.png" src="img/pix.png" />
</div>
<div class="img-box">
<img data-url="img/12.png" src="img/pix.png" />
</div>
<div class="img-box">
<img data-url="img/13.png" src="img/pix.png" />
</div>
<div class="img-box">
<img data-url="img/14.png" src="img/pix.png" />
</div>
<div class="img-box">
<img data-url="img/15.png" src="img/pix.png" />
</div>
<div class="img-box">
<img data-url="img/16.png" src="img/pix.png" />
</div>
<div class="img-box">
<img data-url="img/17.png" src="img/pix.png" />
</div>
<div class="img-box">
<img data-url="img/18.png" src="img/pix.png" />
</div>
<div class="img-box">
<img data-url="img/19.png" src="img/pix.png" />
</div>
<div class="img-box">
<img data-url="img/20.png" src="img/pix.png" />
</div>
</div>
<script src="js/jquery_1.9.js"></script>
<script src="js/main.js"></script>
</body>
</html>
*{
margin: 0;
padding: 0;
}
/*wrapper*/
.wrapper{
width: 500px;
height: 5000px;
margin: auto;
}
.img-box{
width: 100%;
margin-bottom: 20px;
padding-bottom: 10px;
height: 260px;
text-align: center;
border-bottom: 2px dashed #ccc;
}
$(function(){ var $wd = $(window), $img = $('img'), imgTop, //图片距离顶部高度 scTop, //滚动条高度 wH; //窗口高度 wH = $wd.height(); //获得可视浏览器的高度 $wd.scroll( function() { scTop = $wd.scrollTop(); //获取滚动条到顶部的垂直高度 $img.each(function(){ imgTop = $(this).offset().top; if(imgTop - wH < scTop && //图片必须出现在窗口底部上面 imgTop - wH > 0 && //排除首页图片 $(this).attr('src') != $(this).data('url')){ //排除已经加载过的图片 $(this).attr({ src: $(this).data('url') }); } }); });});
原文链接:https://my.oschina.net/leipeng/blog/221911