<body>
<div class="slider">
<ul>
<li><a href="#"><img src="images/1.jpg" alt=""></a></li>
<li><a href="#"><img src="images/2.jpg" alt=""></a></li>
<li><a href="#"><img src="images/3.jpg" alt=""></a></li>
<li><a href="#"><img src="images/4.jpg" alt=""></a></li>
<li><a href="#"><img src="images/5.jpg" alt=""></a></li>
<li><a href="#"><img src="images/6.jpg" alt=""></a></li>
<li><a href="#"><img src="images/7.jpg" alt=""></a></li>
<li><a href="#"><img src="images/8.jpg" alt=""></a></li>
</ul>
<!--箭头-->
<div class="arrow">
<span class="arrow-left"><</span>
<span class="arrow-right">></span>
</div>
</div>
<script src="jquery-1.12.4.js"></script>
<script>
$(function () {
var count = 0;
$(".arrow-right").click(function(){
count=count+1;
if(count == $(".slider li").length)
{
count=0;
}
console.log(count);
});
});
</script>