<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"/> <title>JS切换图片幻灯切换效果</title> <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 { position: relative; width: 322px; height: 172px; background: #fff; border-radius: 5px; border: 8px solid #fff; margin: 10px auto; } #box .list { position: relative; width: 320px; height: 240px; overflow: hidden; border: 1px solid #ccc; } #box .list li { position: absolute; top: 0; left: 0; width: 320px; height: 240px; opacity: 0; filter: alpha(opacity=0); } #box .list li.current { opacity: 1; filter: alpha(opacity=100); } #box .count { position: absolute; right: 0; bottom: 5px; } #box .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 .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"); 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; var bOrder = true; //切换按钮 for(i = 0; i < aNum.length; i++) { aNum[i].index = i; aNum[i].onmouseover = function() { show(this.index) } } //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() { //判断播放顺序 bOrder ? index++ : index--; //正序 index >= aImg.length && (index = aImg.length - 2, bOrder = false); //倒序 index <= 0 && (index = 0, bOrder = true); //调用函数 show(index) }, 2000); } autoPlay();//应用 function show(a) { index = a; var alpha = 0; for(i = 0; i < aNum.length; i++)aNum[i].className = ""; aNum[index].className = "current"; clearInterval(timer); 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); } }; </script> </head> <body> <div> <ul> <li><img src="https://www.jb51.net/img/3.jpg"/></li> <li><img src="https://www.jb51.net/img/1.jpg"/></li> <li><img src="https://www.jb51.net/img/2.jpg"/></li> <li><img src="https://www.jb51.net/img/3.jpg"/></li> <li><img src="https://www.jb51.net/img/4.jpg"/></li> </ul> <ul> <li>1</li> <li>2</li> <li>3</li> <li>4</li> <li>5</li> </ul> </div> </body> </html>
更多关于JavaScript相关内容感兴趣的读者可查看本站专题：《JavaScript切换特效与技巧总结》、《JavaScript查找算法技巧总结》、《JavaScript动画特效与技巧汇总》、《JavaScript错误与调试技巧总结》、《JavaScript数据结构与算法技巧总结》及《JavaScript数学运算用法总结》