/*
CSS重置
* */ body,
ul,
ol {
margin: 0px;
padding: 0px;
} .flash {
width: 300px;
height: 420px;
position: relative;
overflow: hidden;
} /*图片css*/
ul{
width: 300%;
position: absolute;
left: 0px;
top: 0px;
transition: 0.5s;
}
ul,
ol {
list-style: none;
} ul li {
width: 300px;
height: 420px;
float: left;
transition: 0.5s;
} ul li:nth-of-type(1) {
background: green;
} ul li:nth-of-type(2) {
background: blue;
} ul li:nth-of-type(3) {
background: red;
} ul li.now {
z-index: 1;
opacity: 1;
} /*箭头css*/ nav a {
position: absolute;
top: 100px;
z-index: 999;
font-size: 36px;
width: 40px;
height: 60px;
line-height: 60px;
text-align: center;
text-decoration: none;
} nav a:hover {
background: #333;
color: white;
} nav a:nth-of-type(1) {
left: 0px;
} nav a:nth-of-type(2) {
right: 0px;
} /*原点css*/ ol {
position: absolute;
bottom: 50px;
right: 50px;
z-index: 99;
} ol li {
float: left;
width: 12px;
height: 12px;
border: 2px solid #333;
background: #ccc;
border-radius: 50%;
margin: 0px 5px;
} ol li.nowx {
background: white;
border-color: red;
box-shadow: 0px 0px 3px black;
} <!DOCTYPE html>
<html> <head>
<meta charset="UTF-8">
<title></title>
<link rel="stylesheet" href="flash.css" />
<style type="text/css">
#s1,
#s2,
#s3 {
float: left;
margin-left: 10px;
}
</style>
</head> <body> <!--
分析功能：
1、左右箭头切换图功能
切换小圆点。
onclick 2、单击小原点时候也能换图
点击哪个小圆点，哪个小圆点对应图片显示。
onclick 3、淡入淡出效果。
left
transition -->
<section id="s1">
<div class="flash">
<ul>
<li class="now">A</li>
<li>B</li>
<li>C</li>
</ul>
<ol>
<li class="nowx"></li>
<li></li>
<li></li>
</ol>
<nav>
<a href="#"> < </a>
<a href="#"> > </a>
</nav>
</div>
</section> <section id="s2">
<div class="flash">
<ul>
<li class="now">A</li>
<li>B</li>
<li>C</li>
</ul>
<ol>
<li class="nowx"></li>
<li></li>
<li></li>
</ol>
<nav>
<a href="#"> < </a>
<a href="#"> > </a>
</nav>
</div>
</section> <section id="s3">
<div class="flash">
<ul>
<li class="now">A</li>
<li>B</li>
<li>C</li>
</ul>
<ol>
<li class="nowx"></li>
<li></li>
<li></li>
</ol>
<nav>
<a href="#"> < </a>
<a href="#"> > </a>
</nav>
</div>
</section>
<script type="text/javascript">
function myMove(_id) {
var arrs = document.querySelectorAll(_id + " nav a");
var lisx = document.querySelectorAll(_id + " ol li");
var ul = document.querySelector(_id + " ul");
var lis = document.querySelectorAll(_id + " ul li");
var flash = document.querySelector(_id + " .flash");
var i = 0;
//单击左边
arrs[0].onclick = Pre;
//单击右边箭头
arrs[1].onclick = Next function Next() {
i < (lis.length - 1) ? i++ : null;
ul.style.left = -i * 300 + "px";
MyIni(i)
} function Pre() {
i >= 1 ? i-- : null;
ul.style.left = -i * 300 + "px";
MyIni(i)
} function MyIni(k) {
for(var j = 0; j < lisx.length; j++) {
lisx[j].className = "";
}
lisx[k].className = "nowx";
} } myMove("#s1");
myMove("#s2");
myMove("#s3");
</script>
</body> </html>