Rumah > Artikel > hujung hadapan web > JS无缝滚动
<!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title></title> <style type="text/css"> ul, li { margin: 0; padding: 0; list-style-type: none; } img { height: 300px; width: 300px; } ul { position: absolute; left: 0; top: 0; } li { float: left; } #div1 { height: 300px; width: 1200px; background-color: red; margin: 100px auto; position: relative; overflow: hidden; } input{ border: 1px solid #8A2BE2; height: 100px; width: 200px; font-size: 20px; color: white; background-color: #FFB6C1; margin-left: 100px; } </style> </head> <body> <div id="div1"> <ul> <li><img src="img/014.jpg" /></li> <li><img src="img/017.jpg" /></li> <li><img src="img/018.jpg" /></li> <li><img src="img/019.jpg" /></li> </ul> </div> <input type="button" value="向左滚动" /> <input type="button" value="向右滚动" /> </body> <script type="text/javascript"> // 实现无缝滚动,鼠标移入停止滚动,移出继续滚动,以及可以调节滚动方向效果 var oDiv = document.getElementById("div1"); var ul = document.getElementsByTagName("ul")[0]; var liS = document.getElementsByTagName("li"); var timer = null; var speed = 4; ul.innerHTML = ul.innerHTML + ul.innerHTML; ul.style.width = liS[0].offsetWidth * liS.length + "px"; timer = setInterval(move, 30); oDiv.onmouseover = function() {//实现鼠标移入暂停 clearInterval(timer); } oDiv.onmouseout = function() {//鼠标移出继续滚动 timer = setInterval(move, 30); } move();//每次执行move()的时候都会延迟30ms,// /在第一次的实际效果上有瑕疵,在外面调用一次move() function move() { if(-ul.offsetLeft > ul.offsetWidth / 2) {//左滚无缝 ul.style.left = 0 + "px"; } if(ul.offsetLeft > 0) {//右滚无缝 ul.style.left = -ul.offsetWidth / 2 + "px"; } ul.style.left = ul.offsetLeft + speed + "px"; }
//实现通过按钮改变运动方向的功能
var inputs = document.getElementsByTagName("input"); inputs[0].onclick = function() { speed = -4; } inputs[1].onclick = function() { speed = 4; } </script> </html>