js图片自动切换幻灯片特效代码分享，可根据自己的需求来修改图片大小、图片数量、图片切换速度等参数。
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<title>五张图片淡入淡出切换展示特效_武鸣人</title>
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<meta name="description" content="欢迎来到武鸣人信息资源平台，各种信息免费发布，资源共享合作共赢，分享互联网流行的励志语录经典短句，减肥健身健康小常识及打卡记录，收集各种js特效代码。">
<style>
body,div,ul,li{margin:0;padding:0;}
ul{list-style-type:none;}
body{background:#000;text-align:center;font:12px/20px Arial;}
#box_www_wuming_ren{position:relative;width:492px;height:172px;background:#fff;border-radius:5px;border:8px solid #fff;margin:10px auto;}
#box_www_wuming_ren .list_www_wuming_ren{position:relative;width:490px;height:170px;overflow:hidden;border:1px solid #ccc;}
#box_www_wuming_ren .list_www_wuming_ren li{position:absolute;top:0;left:0;width:490px;height:170px;opacity:0;filter:alpha(opacity=0);}
#box_www_wuming_ren .list_www_wuming_ren li.current{opacity:1;filter:alpha(opacity=100);}
#box_www_wuming_ren .count{position:absolute;right:0;bottom:5px;}
#box_www_wuming_ren .count li{color:#fff;float:left;width:20px;height:20px;cursor:pointer;margin-right:5px;overflow:hidden;background:#F90;opacity:0.7;filter:alpha(opacity=70);border-radius:20px;}
#box_www_wuming_ren .count li.current{color:#fff;opacity:1;filter:alpha(opacity=100);font-weight:700;background:#f60;}
#tmp{width:100px;height:100px;background:red;position:absolute;}
</style>
<script type="text/javascript">
window.onload = function ()
{
var oBox = document.getElementById("box_www_wuming_ren");
var aUl = document.getElementsByTagName("ul");
var aImg = aUl[0].getElementsByTagName("li");
var aNum = aUl[1].getElementsByTagName("li");
var timer = play = null;
var i = index = 0;
//切换按钮
for (i = 0; i < aNum.length; i++)
{
aNum[i].index = i;
aNum[i].onmouseover = function ()
{
show(this.index)
}
}
//武鸣人网站https://www.wuming.ren 网站很好记住，wuming.ren(武鸣拼音.ren域名后缀)
//鼠标划过关闭定时器
oBox.onmouseover = function ()
{
clearInterval(play)
};
//鼠标离开启动自动播放
oBox.onmouseout = function ()
{
autoPlay()
};
//自动播放函数
function autoPlay ()
{
play = setInterval(function () {
index++;
index >= aImg.length && (index = 0);
show(index);
},2000);
}
autoPlay();//应用
//图片切换, 淡入淡出效果
function show (a)
{
index = a;
var alpha = 0;
for (i = 0; i < aNum.length; i++)aNum[i].className = "";
aNum[index].className = "current";
clearInterval(timer);
//武鸣人网站https://www.wuming.ren 网站很好记住，wuming.ren(武鸣拼音.ren域名后缀)
for (i = 0; i < aImg.length; i++)
{
aImg[i].style.opacity = 0;
aImg[i].style.filter = "alpha(opacity=0)";
}
timer = setInterval(function () {
alpha += 2;
alpha > 100 && (alpha =100);
aImg[index].style.opacity = alpha / 100;
aImg[index].style.filter = "alpha(opacity = " + alpha + ")";
alpha == 100 && clearInterval(timer)
},20);
}
};//武鸣人网站https://www.wuming.ren 网站很好记住，wuming.ren(武鸣拼音.ren域名后缀)
</script>
</head>
<body>
<a href="https://www.wuming.ren">武鸣人</a>，各种信息资源免费发布，分享励志语录经典短句，减肥健身常识，各种js特效代码。网站很好记住，wuming.ren(武鸣拼音.ren域名后缀)<hr>
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<script type="text/javascript" src="https://www.wuming.ren/ad/tc.js"></script>
<script type="text/javascript" src="https://www.wuming.ren/ad/a.js"></script>
<div id="box_www_wuming_ren">
<ul class="list_www_wuming_ren">
<li class="current"><img src="/img/20240223_www_wuming_ren_1.jpg" width="490" height="170" /></li>
<li><img src="/img/20240223_www_wuming_ren_2.jpg" width="490" height="170" /></li>
<li><img src="/img/20240223_www_wuming_ren_3.jpg" width="490" height="170" /></li>
<li><img src="/img/20240223_www_wuming_ren_4.jpg" width="490" height="170" /></li>
<li><img src="/img/20240223_www_wuming_ren_5.jpg" width="490" height="170" /></li>
</ul>
<ul class="count">
<li class="current">1</li>
<li>2</li>
<li>3</li>
<li>4</li>
<li>5</li>
</ul>
</div>
</body>
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