用JavaScript 实现轮播
//以下是样式
<style type="text/css"> * { margin: 0; padding: 0; text-decoration: none; } body { padding: 20px; } #container { width: 600px; height: 400px; border: 3px solid #333; overflow: hidden; position: relative; } #list { width: 4200px; height: 400px; position: absolute; z-index: 1; } #list img { float: left; } #buttons { position: absolute; height: 10px; width: 100px; z-index: 2; bottom: 20px; left: 250px; } #buttons span { cursor: pointer; float: left; border: 1px solid #fff; width: 10px; height: 10px; border-radius: 50%; background: #333; margin-right: 5px; } #buttons .on { background: orangered; } .arrow { cursor: pointer; display: none; line-height: 39px; text-align: center; font-size: 36px; font-weight: bold; width: 40px; height: 40px; position: absolute; z-index: 2; top: 180px; background-color: RGBA(0,0,0,.3); color: #fff; } .arrow:hover { background-color: RGBA(0,0,0,.7); } #container:hover .arrow { display: block; } #prev { left: 20px; } #next { right: 20px; } </style>
<body> <div id="container"> <div id="list" style="left:-600px;"> <img src="img/5.jpg" alt="Alternate Text" /> <img src="img/1.jpg" alt="Alternate Text" /> <img src="img/2.jpg" alt="Alternate Text" /> <img src="img/3.jpg" alt="Alternate Text" /> <img src="img/4.jpg" alt="Alternate Text" /> <img src="img/5.jpg" alt="Alternate Text" /> <img src="img/1.jpg" alt="Alternate Text" /> </div> <div id="buttons"> <span index="1" class="on"></span> <span index="2"></span> <span index="3"></span> <span index="4"></span> <span index="5"></span> </div> <a href="javasript:;" class="arrow" id="prev"><</a> <a href="javasript:;" class="arrow" id="next">></a> </div> </body>
<script type="text/javascript"> window.onload = function () { var container = document.getElementById("container"); var list = document.getElementById("list"); var bottons = document.getElementById("buttons").getElementsByTagName("span"); var prev = document.getElementById("prev"); var next = document.getElementById("next"); next.onclick = function () { list.style.left = parseInt(list.style.left) - 600 + "px"; }; prev.onclick = function () { list.style.left = parseInt(list.style.left) + 600 + "px"; } }; </script>
//利用JavaScript实现动态轮播,首先是实现箭头之间的切换。
<script type="text/javascript"> window.onload = function () { var container = document.getElementById("container"); var list = document.getElementById("list"); var bottons = document.getElementById("buttons").getElementsByTagName("span"); var prev = document.getElementById("prev"); var next = document.getElementById("next"); function animate(offset) { var newleft = parseInt(list.style.left) + offset; list.style.left = newleft + "px"; if (newleft > -600) { list.style.left = -3000 + "px"; } if (newleft < -3000) { list.style.left = -600 + "px"; } } next.onclick = function () { animate(-600); }; prev.onclick = function () { animate(600); } }; </script>
<script type="text/javascript"> window.onload = function () { var container = document.getElementById("container"); var list = document.getElementById("list"); var buttons = document.getElementById("buttons").getElementsByTagName("span"); var prev = document.getElementById("prev"); var next = document.getElementById("next"); var index = 1; function showButton() { for (var i = 0; i < buttons.length; i++) { if (buttons[i].className == "on") { buttons[i].className = ""; break; } } buttons[index - 1].className = "on"; } function animate(offset) { var newleft = parseInt(list.style.left) + offset; list.style.left = newleft + "px"; if (newleft > -600) { list.style.left = -3000 + "px"; } if (newleft < -3000) { list.style.left = -600 + "px"; } } next.onclick = function () { index += 1; showButton(); animate(-600); }; prev.onclick = function () { index -= 1; showButton(); animate(600); } }; </script>
<script type="text/javascript"> window.onload = function () { var container = document.getElementById("container"); var list = document.getElementById("list"); var buttons = document.getElementById("buttons").getElementsByTagName("span"); var prev = document.getElementById("prev"); var next = document.getElementById("next"); var index = 1; var animated = false; function showButton() { for (var i = 0; i < buttons.length; i++) { if (buttons[i].className == "on") { buttons[i].className = ""; break; } } buttons[index - 1].className = "on"; } function animate(offset) { var newleft = parseInt(list.style.left) + offset; list.style.left = newleft + "px"; if (newleft > -600) { list.style.left = -3000 + "px"; } if (newleft < -3000) { list.style.left = -600 + "px"; } } next.onclick = function () { if (index == 5) { index = 1; } else { index += 1; } showButton(); animate(-600); }; prev.onclick = function () { if (index == 1) { index = 5; } else { index -= 1; } showButton(); animate(600); } }; </script>
现实了焦点轮播图的滚动
<script type="text/javascript"> window.onload = function () { var container = document.getElementById("container"); var list = document.getElementById("list"); var buttons = document.getElementById("buttons").getElementsByTagName("span"); var prev = document.getElementById("prev"); var next = document.getElementById("next"); var index = 1; var len = 5; var animated = false; var interval = 3000; var timer; function showButton() { for (var i = 0; i < buttons.length; i++) { if (buttons[i].className == "on") { buttons[i].className = ""; break; } } buttons[index - 1].className = "on"; } function animate(offset) { if (offset == 0) { return; } animated = true; var time = 300;//位移总时间 var inteval = 10;//位移间隔时间 var spend = offset / (time / inteval);//每次位移量 var left = parseInt(list.style.left) + offset; var newleft = parseInt(list.style.left) + offset; var go = function () { if ((spend > 0 && parseInt(list.style.left < left)) || (spend < 0 && parseInt(list.style.left < left))) { list.style.left = parseInt(list.style.lefe) + spend + "px"; setTimeout(go, interval);//定时器 //interval 这是时间长度之后,我们就运行go()函数,也就是10s钟之后我们运行go()函数 } else { list.style.left = left + 'px'; if (left > -200) { list.style.left = -600 * len + 'px'; } if (left < (-600 * len)) { list.style.left = '-600px'; } animated = false; } } go(); } next.onclick = function () { //给右箭头加上点击事件 //如果索引等于5时,返回第一张相片,如果不是,就让索引+1 if (index == 5) { index = 1; } else { index += 1; } showButton(); animate(-600); }; prev.onclick = function () { //给右箭头加上点击事件 //如果索引等1时,返回第5张相片,如果不是,就让索引-1 if (index == 1) { index = 5; } else { index -= 1; } showButton(); animate(600); } for (var i = 0; i < buttons.length; i++) {//让按钮有点击事件 buttons[i].onclick = function () { var myIndex = parseInt(this.getAttribute("index")); var offset = -600 * (myIndex - index); animate(offset); index = myIndex; showButton(); } } function play() { timer = setTimeout(function () { next.onclick(); play(); }, interval); } function stop() { clearTimeout(timer);//清除定时器 } container.onmouseover = stop; container.onmouseout = play; play(); }; </script>