<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>无标题文档</title>
<style type="text/css">
* {margin:0;padding:0;align:center }
ul, li {list-style:none;}
.mid {margin:0 auto;}
.area {240px;height:270px;overflow:hidden;background:#999;margin-top:150px;position:relative;}
#pic_list {position:relative;}
#pic_list li {position:absolute;visibility:hidden;}
#pic_list li.show {visibility:visible;}
#pic_list li img {vertical-align:middle;}
.button {240px;height:20px;line-height:20px;background:#ccc;position:absolute;bottom:0px;}
#button {float:right;}
#button li {float:left;20px;height:20px;text-align:center;margin:0 3px;font-family:"Arial";font-size:12px;color:#fff;background:#000;}
#button li.current {background:#f00;cursor:pointer;}
</style>
</head>
<body>
<div class="area mid" >
<div id="imgbox" >
<ul id="pic_list" >
<li class="show" id="one"><img src="http://img1.27.cn/images/201109/29/1317279971_77011100.jpg" width="240" /></li>
<li id="two"><img src="http://img1.27.cn/images/201109/29/1317279972_01691900.jpg" width="240" /></li>
<li id="three"><img src="http://img1.27.cn/images/201109/29/1317279973_69082200.jpg" width="240" /></li>
<li id="four"><img src="http://img1.27.cn/images/201109/29/1317281054_38572100.jpg" width="240" /></li>
<li id="five"><img src="http://img1.27.cn/images/201109/29/1317281056_61630800.jpg" width="240" /></li>
</ul>
</div>
<div class="button" >
<ul id="button" >
<li class="current" id="but_one">1</li><li id="but_two">2</li><li id="but_three">3</li><li id="but_four">4</li><li id="but_five">5</li>
</ul>
</div>
</div>
<script type="text/javascript">
(function(){
var imgbox = document.getElementById("imgbox");
var pic_list = document.getElementById("pic_list");
var pics = pic_list.getElementsByTagName("li");
var button = document.getElementById("button").getElementsByTagName("li");
var p;
var start;
function autoplay(start){for(i=start;i<button.length;i++){ //设置起始值为start参数.
(function(){
var p=i; // 为p赋值i. i等于0,1,2,3,4;
button[i].onmouseover=function change(){ //button[0],button[1],button[2],button[3],button[4] onmouseover可以触发函数;
for(j=0;j<this.parentNode.childNodes.length;j++){ //以this(当前触发事件的元素)为起点,的父节点的所有子节点的length值为最高值,开始遍历. ;
this.parentNode.childNodes[j].className=""; //以this(当前触发事件的元素)为起点,的父节点的所有子节点的className为空. 危险慎用.;
}
this.className="current"; //this. 即当前触发onmouseover的元素的className为"current";
for(m=0;m<pics.length;m++){ //以pics.length为最高值进行遍历.遍历pics.;
pics[m].className=""; //清空所有pics数组中所有元素的className;
if (m==p){ //当m==p (p==i) 所以m=i时,触发下列函数
pics[m].className="show"; //pics的第m个元素的className值为show; m在这里等于i;
}
}
}
})();
}
}
autoplay(0);
})();
</script></body>
</html>
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