子元素为img

$(function(){
    $('#skippr').skippr({
        childrenElementType: 'img'
    });
});

<div id="container">
    <div id="skippr">
        <img src="img/img1.jpg" alt="">
        <img src="img/img2.jpg" alt="">
        <img src="img/img3.jpg" alt="">
        <img src="img/img4.jpg" alt="">
        <img src="img/img5.jpg" alt="">
    </div>
</div>