本文实例为大家分享了js图片淡入淡出切换详细代码，供大家参考，具体内容如下
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title></title>
<style type="text/css">
*{padding: 0;margin: 0;}
ul{overflow: hidden;}
li{list-style: none;height: 30px;border: 1px solid #000;width: 100px;float: left;line-height: 30px;text-align: center;}
img{width:306px;opacity: 0;}
.active{background:yellow}
</style>
</head>
<body>
<ul>
<li>王宝强</li>
<li>马蓉</li>
<li>宋吉</li>
</ul>
<img src=""/>
</body>
<script src="public.js"></script>
<script type="text/javascript">
var oLi=document.getElementsByTagName("li");
var oImg=document.getElementsByTagName("img")[0];
var arr=['img/wbb.jpg','img/wlp.jpg','img/qs.jpg']
var time=null;
var time1=null;
for(i=0;i<oLi.length;i++){
oLi[i].index=i;
oLi[i].onclick=function(){
for(i=0;i<oLi.length;i++){
oLi[i].className="";
}
this.className="active";
oImg.src=arr[this.index];
var num=0;
var step=2;
clearInterval(time);
clearInterval(time1);
time = setInterval(function(){
num+=step;
if(num>=200){
num=200;
clearInterval(time);
}
oImg.style.opacity = num/200;
},20)
}
}
</script>
</html>
