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JS自动渐变轮播

 

渐变主要是通过CSS3的动画实现。

只需给css中添加transtion动画时间加上JS设置指定图片透明度显示与消失即可实现渐变过程。

 

效果图:

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HTML:

<!DOCTYPE html><html>    <head>        <meta charset="UTF-8">        <title></title>        <link rel="stylesheet" type="text/css" href="css/style3.css" />        <script type="text/javascript" language="JavaScript" src="js/script3.js"></script>    </head>    <body>          <div id="box">            <ul>                <li></li>                <li></li>                <li></li>                <li></li>            </ul>        </div>    </body></html>

CSS:

    *{margin:0; padding:0;}    #box{width:300px; height:165px; border:1px black solid; margin:10px auto;}    #box ul{list-style:none; position:relative;}    #box ul li{width:300px; height:165px; position:absolute; transition:all 1s; opacity:0;}    #box ul li:nth-of-type(1){background:url(../img/img1.jpg); background-size:100%;}    #box ul li:nth-of-type(2){background:url(../img/img2.jpg); background-size:100%;}    #box ul li:nth-of-type(3){background:url(../img/img3.jpg); background-size:100%;}    #box ul li:nth-of-type(4){background:url(../img/img4.jpg); background-size:100%;}

JS:

onload = function(){    var li = document.getElementById(‘box‘).getElementsByTagName(‘li‘);    var index = 0;         goto();    function goto(){        for(var i=0;i<li.length;i++){li[i].style.opacity = 0;}                  if(index == li.length) index = 0;                                         li[index++].style.opacity = 1;                                        }    var timer = setInterval(goto,3000);                                    }

 

ps:只能帮你到这里了,按钮什么的没有....

JS自动渐变轮播