JavaScript/无缝右滚动.html at master · Harrdy2018/JavaScript · GitHub

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<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>无缝滚动</title>
    <style>
        * {
            margin: 0;
            padding: 0
        }
        #div1{
            width: 712px;
            height: 108px;
            margin: 100px auto;
            position: relative;
            background: red;
            overflow: hidden;
        }
        #div1 ul{
            position: absolute;
            left: 0;
            top: 0;
        }
        #div1 ul li{
            float: left;
            width: 178px;
            height: 108px;
            list-style: none;
        }
    </style>
    <script>
        window.onload=function ()
        {
            var oDiv1=document.getElementById('div1');
            var oUl=oDiv1.getElementsByTagName('ul')[0];
            var aLi=oUl.getElementsByTagName('li');
            oUl.innerHTML=oUl.innerHTML+oUl.innerHTML;
            oUl.style.width=aLi[0].offsetWidth*aLi.length+'px';

            setInterval(function ()
            {
                if(oUl.offsetLeft<-oUl.offsetWidth/2)
                {
                    oUl.style.left=0;
                }
                if(oUl.offsetLeft>0)
                {
                    oUl.style.left=-oUl.offsetWidth/2+'px';
                }
                oUl.style.left=oUl.offsetLeft+2+'px';
            },30);
        };
    </script>
</head>
<body>
<div id="div1">
    <ul>
        <li><img src="images/1.jpg"></li>
        <li><img src="images/2.jpg"></li>
        <li><img src="images/3.jpg"></li>
        <li><img src="images/4.jpg"></li>
    </ul>
</div>
</body>
</html>