圖片懶加載

<script src="jquery.js"></script>
<script src="jquery.lazyload.js"></script>

<img class="lazy" src='../../images/defaultpic.jpg' data-original="img/example.jpg" width="640" height="480">

$(function() {
    $("img.lazy").lazyload();
});

$("img.lazy").lazyload({
    threshold : 200
});

$("img.lazy").lazyload({
    event : "click"
});