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<!DOCTYPE>
<html>
<head>
<meta http-equiv="content-type" content="text/html" charset="utf-8">
<title>Image play</title>
<style>
body{
width:430px;
margin:20px auto;
}
p.now{
display:block;
width:400px;
height:200px;
overflow:hidden;
border:1px solid #ccc;
}
li.now{
color:#ccc;
}
li{
list-style:none;
float:left;
padding:0 10px;
margin-bottom:5px;
border:1px solid #ccc;
background:#eee;
}
#fd{
list-style:none;
float:left;
padding:0 10px;
border:1px solid #ccc;
margin:0 auto;
background:#eee;
}
img{
width:400px;
height:200px;
padding:1px;
/*padding-top:18px;*/
}
</style>
</head>
<body>
<div id="fd">
<p class="now"><img src="./images/pic1.jpg"></p>
<p style="display:none;"><img src="./images/pic2.jpg"></p>
<p style="display:none;"><img src="./images/pic3.jpg"></p>
<p style="display:none;"><img src="./images/pic4.jpg"></p>
<ul>
<li class="now">1</li>
<li>2</li>
<li>3</li>
<li>4</li>
</ul>
</div>
<script>
var tags=$("fd").getElementsByTagName("li"); // 获取切换按钮节点
var cats=$("fd").getElementsByTagName("p"); // 获取切换内容节点
var current; // 高置当前帧的变量宣容器
var timer=2000; // 设置2秒循环一次
function disAll(){
for(var i=0; i<tags.length; i++){
tags[i].className="";
cats[i].className="";
cats[i].style.display="none";
}
}
function setNow(){
for(var i=0; i<tags.length; i++){
if(tags[i].className=="now"){
current=i;
}
}
}
for(var j=0; j<tags.length; j++){
tags[j].onmouseover=function(){
clearInterval(h);
disAll();
this.className="now";
setNow();
cats[current].style.display="block";
cats[current].className="now";
}
tags[j].onmouseout=function(){
setNow();
h=setInterval("goNext()", 3000);
}
}
function goNext(){
setNow();
current+=1;
if(current>=parseInt(tags.length)){
current=0;
disAll();
cats[0].style.display="block";
tags[0].className="now";
cats[0].className="now";
}else{
disAll();
cats[current].style.display="block";
cats[current].className="now";
tags[current].className="now";
}
}
var h=setInterval("goNext()", timer);
function $(obj){
return document.getElementById(obj);
}
</script>
</body>
</html>
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原文地址：http://www.cnblogs.com/myall/p/4802750.html
