最简单轮播形式，js中通过pic的display属性控制变换，也可通过调整Pic的margin-Left
效果如图：
实现代码：
<!DOCTYPE html>
<html>
<head lang="en">
<meta charset="UTF-8">
<title></title>
<style type="text/css">
*{
margin: 0;
padding: 0;
list-style: none;
text-decoration: none;
}
.wrap{
width: 490px;
height: 170px;
margin: 100px auto;
border: 1px solid #000000;
position: relative;
overflow: hidden;
}
#pic{
width: 2450px;
height: 170px;
}
#pic li{
float: left;
}
#list{
position: absolute;
bottom: 10px;
left:150px ;
}
#list li{
float: left;
width: 15px;
height: 15px;
background: #fff;
margin: 0 10px;
border-radius: 50%;
cursor: pointer;
}
#list .on{
background: #e27a00;
}
.Prev{
top: 30px;
left: 0;
}
.Next{
top: 30px;
right: 0;
}
.Prev,.Next{
position: absolute;
font-size: 80px;
font-weight: bold;
color:#fff ;
-webkit-transition: all 0.35s ease-in-out
}
.Next:hover,
.Prev:hover{
background: #ccc;
background: rgba(204, 204, 204, 0.4);
}
.show{
display: block;
}
.hidden{
display: none;
}
</style>
<script type="text/javascript">
window.onload=function(){
var pic=document.getElementById('pic').getElementsByTagName('li');
var list=document.getElementById('list').getElementsByTagName('li');
var prev=document.getElementById('Prev');
var next=document.getElementById('Next');
var index=0;
var timer=null;
auto();
for(var i=0;i<list.length;i++){
list[i].index=i;
list[i].onmouseover=function(){
clearInterval(timer);
Change(this.index);
}
list[i].onmouseout=function(){
auto();
}
pic[i].onmouseover=function(){
clearInterval(timer);
}
pic[i].onmouseout=function(){
auto();
}
}
prev.onclick=function(){
clearInterval(timer);
index--;
if(index<=0){
index=list.length-1;
}
Change(index);
}
next.onclick=function(){
clearInterval(timer);
index++;
if(index>=list.length){
index=0;
}
Change(index);
}
prev.onmousemove=function(){
clearInterval(timer);
}
prev.onmouseout=function(){
auto();
}
next.onmouseover=function(){
clearInterval(timer);
}
next.onmouseout=function(){
auto();
}
function Change(curIndex){
for(var i=0;i<list.length;i++){
list[i].className="";
pic[i].className="hidden";
}
list[curIndex].className="on";
pic[curIndex].className="show";
index=curIndex;
}
function auto(){
timer=setInterval(function(){
index++;
if(index>=list.length){
index=0
}
Change(index);
},2000);
}
}
</script>
</head>
<body>
<div class="wrap" id="wrap">
<ul id="pic">
<li class="show"><a href="#"><img src="/UploadFiles/2021-04-02/54111cd9000174cd04900170.jpg">
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