<!doctype html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Document</title>
<style>
*{margin:0;
padding:0;
list-style:none;}
.wrap{height:170px;
width:490px;
overflow: hidden;
position: relative;
margin:100px auto;}
.wrap ul li img{height:170px;width: 100%}
.wrap ol{position:absolute;
right:5px;
bottom:10px;}
.wrap ol li{height:20px; width: 20px;
background:#ccc;
border:solid 1px #666;
margin-left:5px;
color:#000;
float:left;
line-height:20px;
text-align:center;
cursor:pointer;}
.wrap ol .on{background:#E97305;
color:#fff;}
</style>
<script type="text/javascript">
window.onload=function(){
var wrap=document.getElementById('wrap');
pic=document.getElementById('pic');
img=pic.getElementsByTagName("img");
list=document.getElementById('list').getElementsByTagName('li');
index=0;
timer=null;
if (timer) {
clearInterval(timer);
timer = null;
}
// 定义并调用自动播放函数
timer=setInterval(function(){autoPlay()},2000);
function autoPlay(){
index++;
if(index>=list.length){index=0}
changOption(index);
}
// 鼠标划过整个容器时停止自动播放
wrap.onmouseover=function(){
clearInterval(timer);
};
// 鼠标离开整个容器时继续播放至下一张
wrap.onmouseout=function () {
setInterval(function(){autoPlay()},2000);
};
// 遍历所有数字导航实现划过切换至对应的图片
for (var i = 0; i < list.length; i++) {
list[i].aa = i;
list[i].onmouseover = function () {
changOption(this.aa);
};
list[i].onmouseout = function () {
setInterval(function () {
autoPlay()}, 2000);
}
}
function changOption(currIndex){
if (timer) {
clearInterval(timer);
timer = null;
}
for (var j = 0; j < list.length; j++) {
list[j].className = "";
img[j].style.display = "none";
}
list[currIndex].className = "on";
img[currIndex].style.display = "block";
index=currIndex;
}
}
</script>
</head>
<body>
<div class="wrap" id='wrap'>
<ul id="pic">
<li><img src="http://img1.sycdn.imooc.com//54111cd9000174cd04900170.jpg" alt=""></li>
<li><img src="http://img1.sycdn.imooc.com//54111dac000118af04900170.jpg" alt=""></li>
<li><img src="http://img1.sycdn.imooc.com//54111d9c0001998204900170.jpg" alt=""></li>
<li><img src="http://img1.sycdn.imooc.com//54111d8a0001f41704900170.jpg" alt=""></li>
<li><img src="http://img1.sycdn.imooc.com//54111d7d00018ba604900170.jpg" alt=""></li>
</ul>
<ol id="list">
<li class="on">1</li>
<li>2</li>
<li>3</li>
<li>4</li>
<li>5</li>
</ol>
</div>
</body>
</html>
