JS实现简易图片自动轮播
编程学习 2021-07-04 14:06www.dzhlxh.cn编程入门
这篇文章主要为大家详细介绍了JS实现简易图片自动轮播，文中示例代码介绍的非常详细，具有一定的参考价值，感兴趣的小伙伴们可以参考一下
本文实例为大家分享了JS实现简易图片自动轮播的具体代码，供大家参考，具体内容如下
<!doctype html>
<html>
<head>
<meta charset="utf-8" />
<title>自动播放选项卡</title>
<style>
*{
margin:0;
padding:0;
}
.box{
width:600px;
height:400px;
border:1px solid red;
margin:100px auto;
position:relative;
}
a{
font-size:40px;
position:absolute;
text-decoration:none;
top:-10px;
}
#prev{
left:0;
}
#next{
right:0;
}
#pos{
margin-left:30px;
}
input{
width:90px;
height:40px;
float:left;
outline:none;
border:0;
}
.box div{
width:600px;
height:400px;
background:skyblue;
text-align:center;
line-height:300px;
font-size:100px;
font-weight:bold;
text-shadow:5px 5px 5px #f90;
display:none;
}
.box .show{
display:block;
}
.box .active{
width:88px;
color:#fff;
font-size:18px;
font-weight:bold;
background:#f90;
}
</style>
<script>
window.onload = function()
{
var oBox = document.getElementById('box');
var oPrev = document.getElementById('prev');
var oNext = document.getElementById('next');
var aBtn = document.getElementsByTagName('input');
var aDiv = oBox.getElementsByTagName('div');
var oNow = 0;
for (var i=0;i<aBtn.length;i++) {
aBtn[i].dataIndex = i;
aBtn[i].onclick = function(){
oNow = this.dataIndex;
for (var i=0;i<aBtn.length;i++) {
aBtn[i].className = '';
aDiv[i].className = '';
}
this.className = 'active';
aDiv[this.dataIndex].className = 'show';
}
}
oPrev.onclick = prev;
oNext.onclick = next;
//实现自动播放
var timer = setInterval(next , 1000);
oBox.onmouseover = function()
{
clearInterval(timer);
}
oBox.onmouseout = function()
{
timer = setInterval(next , 1000);
}
function prev()
{
oNow--;
if (oNow < 0) {
oNow = aBtn.length-1;
}
tab();
}
function next()
{
oNow++;
if (oNow > aBtn.length-1) {
oNow = 0;
}
tab();
}
function tab()
{
for (var i=0;i<aBtn.length;i++) {
aBtn[i].className = '';
aDiv[i].className = '';
}
aBtn[oNow].className = 'active';
aDiv[oNow].className = 'show';
}
}
</script>
</head>
<body>
<div class="box" id="box">
<a href="javascript:;" id="prev">☜</a>
<a href="javascript:;" id="next">☞</a>
<input type="button" name="" value="亚洲" class="active" id="pos"/>
<input type="button" name="" value="欧洲" />
<input type="button" name="" value="非洲" />
<input type="button" name="" value="北美洲" />
<input type="button" name="" value="南美洲" />
<input type="button" name="" value="大洋洲" />
<div class="show">亚洲</div>
<div>欧洲</div>
<div>非洲</div>
<div>北美洲</div>
<div>南美洲</div>
<div>大洋洲</div>
</div>
</body>
</html>
展示效果：
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