手动轮播图，为轮播图中的一种，轮播图主要有无缝轮播，手动轮播，延迟轮播，切换轮播等等。。。
轮播图主要用于展现图片，新出商品，词条，又能美观网页。給网页中增加动态效果。
手动轮播，是小编认为最简单的一种轮播方式，既能左右翻页，还能通过悬浮按钮，快速预览图片，所以今天就给大家写一个原生js手动轮播图。
一，利用JavaScript制作手动轮播图，首先排版。
引入默认样式表（可以手写）；
<link rel="stylesheet" href="css/Default style sheet.css" />//本博客有css默认样式表可以下载。
div排版布局：
<body>
<div id="box">
<div id="lunbo"><img src="img/1.jpg" id="img"/></div>
<div id="left"><</div>
<div id="right">></div>
<div id="radiu">
<ul>
<li>1</li>
<li>2</li>
<li>3</li>
<li>4</li>
<li>5</li>
</ul>
</div>
</div></body>
二，定义div的CSS样式，给div设置宽高，定位。
<style>body{
background: darkturquoise;
}
#box{
height:320px;
width:480px;
margin: 3px auto;
border: 2px solid red;
}
#lunbo{
height: 292px;
width:453px;
border: 1px solid yellow;
margin: 0px auto;
position: relative;
}
#left{
height: 60px;
width: 60px;
font-size: 60px;
text-align: center;
line-height: 60px;
position: absolute;
top:150px;
left: 440px;
color: black;
}
#right{
height: 60px;
width: 60px;
font-size: 60px;
text-align: center;
line-height: 60px;
position: absolute;
top:150px;
left: 880px;
color: black;
}
#radiu{
height: 30px;
width: 240px;
text-align: center;
margin: 0px auto;
}
#radiu li{
float: left;
background: white;
height: 30px;
width: 30px;
line-height: 30px;
border-radius:50% ;
margin-right:6px;
}
.active{
background: orange;
color: ;
}</style>原生js代码：
<script>window.onload=function(){
var ridiu=document.getElementById("radiu")
var right=document.getElementById("right");
var left=document.getElementById("left")
var img=document.getElementById("img");
var oli=ridiu.getElementsByTagName("li")
var arry=[‘img/1.jpg‘,‘img/2.jpg‘,‘img/3.jpg‘,‘img/4.jpg‘,‘img/5.jpg‘]
??var a=null;
???right.onclick=function(){
???a++
???if(a>arry.length-1){
???a=0;
???}
???
???img.src=arry[a]
?}
???left.onclick=function(){
???a--
???if(a<0){
???a=arry.length-1;
???}
???
???img.src=arry[a]
???
???}
???
???for (var i=0;i<oli.length;i++) {
???
???oli[i].onclick=function(){
???a++
???????if(a==arry.length){
???a=0;
???}
???????????img.src=arry[a];
???}
???
???}
}</script>
HTML全部效果代码：
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>手动轮播图</title>
<link rel="stylesheet" href="css/Default style sheet.css" />
<style>
body{
background: darkturquoise;
}
#box{
height:320px;
width:480px;
margin: 3px auto;
border: 2px solid red;
}
#lunbo{
height: 292px;
width:453px;
border: 1px solid yellow;
margin: 0px auto;
position: relative;
}
#left{
height: 60px;
width: 60px;
font-size: 60px;
text-align: center;
line-height: 60px;
position: absolute;
top:150px;
left: 440px;
color: black;
}
#right{
height: 60px;
width: 60px;
font-size: 60px;
text-align: center;
line-height: 60px;
position: absolute;
top:150px;
left: 880px;
color: black;
}
#radiu{
height: 30px;
width: 240px;
text-align: center;
margin: 0px auto;
}
#radiu li{
float: left;
background: white;
height: 30px;
width: 30px;
line-height: 30px;
border-radius:50% ;
margin-right:6px;
}
.active{
background: orange;
color: ;
}
</style>
<script>
window.onload=function(){
var ridiu=document.getElementById("radiu")
var right=document.getElementById("right");
var left=document.getElementById("left")
var img=document.getElementById("img");
var oli=ridiu.getElementsByTagName("li")
var arry=[‘img/1.jpg‘,‘img/2.jpg‘,‘img/3.jpg‘,‘img/4.jpg‘,‘img/5.jpg‘]
??var a=null;
???right.onclick=function(){
???a++
???if(a>arry.length-1){
???a=0;
???}
???
???img.src=arry[a]
?}
???left.onclick=function(){
???a--
???if(a<0){
???a=arry.length-1;
???}
???
???img.src=arry[a]
???
???}
???
???for (var i=0;i<oli.length;i++) {
???
???oli[i].onclick=function(){
???a++
???????if(a==arry.length){
???a=0;
???}
???????????img.src=arry[a];
???}
???
???}
}
</script>
</head>
<body>
<div id="box">
<div id="lunbo"><img src="img/1.jpg" id="img"/></div>
<div id="left"><</div>
<div id="right">></div>
<div id="radiu">
<ul>
<li>1</li>
<li>2</li>
<li>3</li>
<li>4</li>
<li>5</li>
</ul>
</div>
</div>
</body>
</html>
效果图：
body{
background: darkturquoise;
}
#box{
height:320px;
width:480px;
margin: 3px auto;
border: 2px solid red;
}
#lunbo{
height: 292px;
width:453px;
border: 1px solid yellow;
margin: 0px auto;
position: relative;
}
#left{
height: 60px;
width: 60px;
font-size: 60px;
text-align: center;
line-height: 60px;
position: absolute;
top:150px;
left: 440px;
color: black;
}
#right{
height: 60px;
width: 60px;
font-size: 60px;
text-align: center;
line-height: 60px;
position: absolute;
top:150px;
left: 880px;
color: black;
}
#radiu{
height: 30px;
width: 240px;
text-align: center;
margin: 0px auto;
}
#radiu li{
float: left;
background: white;
height: 30px;
width: 30px;
line-height: 30px;
border-radius:50% ;
margin-right:6px;
}
.active{
background: orange;
color: ;
}
原生js手动轮播图
原文地址：https://www.cnblogs.com/web928943/p/10000115.html