JQuery 懶加載

<script src="jslib/lazy/jquery-1.7.2.min.js"></script>
<script src="jslib/lazy/jquery.lazyload.min.js"></script>
<script src="jslib/lazy/jquery.scrollstop.min.js"></script>
<script>
    $(function() {
        $('img.lazy').lazyload({
            effect:'fadeIn',
            event: 'scrollstop'
        });
    });
</script>
<img class="lazy" data-original="真實URL" src="佔位圖片URL" alt=""/>