https://github.com/tuupola/jquery_lazyload
<img class="lazyload" data-src="img/example.jpg" width="765" height="574">
<img class="lazyload" src="img/example-thumb.jpg" data-src="img/example.jpg" width="765" height="574">
$("img.lazyload").lazyload();
签名：这个人很懒，什么也没有留下！
