div滑块的圆形导航器

Question

我有一个div滑块和滑块div随JSON文件动态，我想在我的JSON文件更新或添加新div时添加圆形导航器，下面是示例代码。

<div id="container">
    <div class="sliders">
        <div class="set"><img src="http://fc01.deviantart.net/fs71/i/2013/232/0/b/random_surfer_panoramic_by_jaydoncabe-d6fin5d.jpg" /></div>
        <div class="set"><img src="http://www.theultimatefinish.co.uk/Images/Rupes-Big-Foot-Random-Orbital-System.jpg" /></div>
        <div class="set"><img src="http://0.media.dorkly.cvcdn.com/93/93/7ad889644c2e4a189c20656c6077683f.jpg" /></div>
        <div class="set"><img src="http://cdn-www.cracked.com/articleimages/dan/coincidences/corsica.jpg" /></div>
        <div class="set"><img src="http://i299.photobucket.com/albums/mm312/AvatarSchool/DesignMagazine/CountdownLayouts/image18.jpg" /></div>
    </div>
    <div class="controls">
        <div id="next">Next</div>
        <div class="circles">
            <a href="#" class="active"></a>
            <a href="#"></a>
            <a href="#"></a>
            <a href="#"></a>
            <a href="#"></a>
        </div>
        <div id="prev">Prev</div>
    </div>
</div>