最简单的轮播

*{
padding:0;
margin:0;
}
li{
list-style:none;
float:left;
}
.content{
width:600px;
height:270px;
margin:100px auto;
}
.content-box{
width:480px;
height:270px;
margin:0 auto;
position:relative;
overflow:hidden;
}
ul{
width:2400px;
overflow:hidden;
position:absolute;
left: -480px;
}
li img{
width:480px;
height: 270px;

}

<div class="content">
<div class="content-box">
<ul>
<li>![](https://timgsa.baidu.com/timg?image&quality=80&size=b9999_10000&sec=1503574592707&di=a3d3ae19930d2c453ec58728e4d6a69a&imgtype=0&src=http%3A%2F%2Fimg.tuku.cn%2Ffile_big%2F201504%2F6fb5de53c5ef451980da0632d6b6b83a.jpg)</li>//图3
<li>![](https://timgsa.baidu.com/timg?image&quality=80&size=b9999_10000&sec=1503574592707&di=50cb6b3fc2f467b197a42e7fa276d17f&imgtype=0&src=http%3A%2F%2Fimg.tuku.cn%2Ffile_big%2F201506%2F5c7a4b9402034d778d3d8886199aebdb.jpg)</li>//图1
<li>![](https://timgsa.baidu.com/timg?image&quality=80&size=b9999_10000&sec=1503574592707&di=d133c2777c2e04c404663e00a3fd49cb&imgtype=0&src=http%3A%2F%2Fimgstore.cdn.sogou.com%2Fapp%2Fa%2F100540002%2F673510.jpg)</li>//图2
<li>![](https://timgsa.baidu.com/timg?image&quality=80&size=b9999_10000&sec=1503574592707&di=a3d3ae19930d2c453ec58728e4d6a69a&imgtype=0&src=http%3A%2F%2Fimg.tuku.cn%2Ffile_big%2F201504%2F6fb5de53c5ef451980da0632d6b6b83a.jpg)</li>//图3
<li>![](https://timgsa.baidu.com/timg?image&quality=80&size=b9999_10000&sec=1503574592707&di=50cb6b3fc2f467b197a42e7fa276d17f&imgtype=0&src=http%3A%2F%2Fimg.tuku.cn%2Ffile_big%2F201506%2F5c7a4b9402034d778d3d8886199aebdb.jpg)</li>//图1
</ul>
</div>
</div>

//此处记得引入jquery cdn：<script src="http://libs.baidu.com/jquery/2.0.0/jquery.min.js"></script>
var n=2;//由于第一张图是实际是最后1张，是用于从最后一张到第一张过度用，所以n=2，从第二张图开始

$(document).ready(function () {//计时器，用于自动轮播
var timer=setInterval(function () {
tonext();
console.log(n);
},1000)
}
)
//从左向右运动的函数，每次调用向右前进一张图片距离，当到达第四张（也就是给观众看的第三张），则left跳回第一张（也就是和它一样的那张，不过排在开头），由于两张图片一样，可以达到无法察觉的效果
function tonext() {
$(‘ul‘).animate({left:-480*n+"px"},function () {
n++;
if(n==4){$(‘ul‘).css({left:0});n=1}
})
}