代码如下：
<!DOCTYPE html> <html lang="en"> <head> <meta charset="utf-8"> <style type = "text/css"> *{ padding: 0; margin: 0; } li { list-style: none; } .box { width: 800px; height: 450px; margin: 50px auto; position: relative; overflow:hidden; } .box span { width: 40px; height: 60px; display: block; position: absolute; top: 225px; margin-top: -20px; cursor: pointer; z-index: 1; } .box #left { width: 76px; height: 112px; background: url('http://www.w2bc.com/upload/201609/20/jiaoben4524/images/buttons.png') no-repeat left 0; left: 0; margin-top: -66px; display: none; } .box #right { width: 76px; height: 112px; background: url('http://www.w2bc.com/upload/201609/20/jiaoben4524/images/buttons.png') no-repeat right 0; right: 0; margin-top: -66px; display: none; } .box #txt { width: 100%; height: 30px; background-color: #000; opacity: 0.4; position: absolute; bottom: 0; color: #fff; line-height: 30px; text-align: center; } #ad { width: 4000px; height: 450px; position: absolute; left: -1600px; } #ad li { float: left; } .box #left:hover { background: url('http://www.w2bc.com/upload/201609/20/jiaoben4524/images/buttons.png') no-repeat left -112px; } .box #right:hover { background: url('http://www.w2bc.com/upload/201609/20/jiaoben4524/images/buttons.png') no-repeat right -112px; } </style> <script type = "text/javascript"> window.onload = function(){ function $(id){ return document.getElementById(id);} var aLi = $("ad").children; function animate(obj,target,arrt){ //关闭上一个定时器 clearInterval(obj.timer); $("txt").innerHTML = obj.children[0].children[0].alt; //管理定时器 obj.timer = setInterval(function(){ //移动步长 var step = (target - obj.offsetLeft) / 10; //步长取整 step = step > 0? Math.ceil(step):Math.floor(step); //移动盒子 ： 盒子位置 + 步长 obj.style.left = obj.offsetLeft + step+ "px"; //关闭定时器 if(obj.offsetLeft%800 ==0){ clearInterval(obj.timer); //判断点击的方向 if(arrt === "left"){ var oLi = $("ad").children[aLi.length - 1].cloneNode(true); //添加到最前面 obj.insertBefore(oLi,obj.children[0]); //删除最后一个盒子 obj.removeChild(obj.children[aLi.length - 1]); //让ul恢复初始值 obj.style.left = "-1600px"; }else{ //克隆第一个盒子 var oLi = obj.children[0].cloneNode(true); //添加到最后面 obj.appendChild(oLi); //删除第一个盒子 obj.removeChild(obj.children[0]); //让ul恢复初始值 obj.style.left = "-1600px"; } } },20); } var timer = setInterval(autoplay,2000); function autoplay(){ animate($("ad"),-2400,"right"); } $("ad").parentNode.onmouseover = function(){ clearInterval(timer); $("left").style.display = "block"; $("right").style.display = "block"; } $("ad").parentNode.onmouseout = function(){ $("left").style.display = "none"; $("right").style.display = "none"; timer = setInterval(autoplay,2000); } $("left").onclick = function(){ clearInterval(timer); animate($("ad"),-800,"left"); } $("right").onclick = function(){ clearInterval(timer); animate($("ad"),-2400,"right"); } } </script> </head> <body> <div> <ul> <li><img src="https://www.w2bc.com/upload/201609/20/jiaoben4524/images/4.jpg" alt="闲静似娇花照水，行动如弱柳扶风。"></li> <li><img src="https://www.w2bc.com/upload/201609/20/jiaoben4524/images/5.jpg" alt="心较比干多一窍，病如西子胜三分。"></li> <li><img src="https://www.w2bc.com/upload/201609/20/jiaoben4524/images/1.jpg" alt="两弯似蹙非蹙笼烟眉，一双似喜非喜含情目。"></li> <li><img src="https://www.w2bc.com/upload/201609/20/jiaoben4524/images/2.jpg" alt="态生两靥之愁，娇袭一身之病。"></li> <li><img src="https://www.w2bc.com/upload/201609/20/jiaoben4524/images/3.jpg" alt="泪光点点，娇喘微微。"></li> </ul> <p>泪光点点，娇喘微微</p> <span></span> <span></span> </div> </body> </html>