<style type="text/css"> .img{display:none;} #dian{ 300px; height:20px; position:relative; top:-30px; left:400px } .yuan{20px; height:20px; background-color:#FFF; border:2px solid #0F6; border-radius:100px; float:left; margin-left:10px} </style> </head> <body> <div style="600px; height:300px;"> <img style=" display:block;" class="img" src="../图片/3be319b6-ca5c-43a9-b988-12479b42999a.jpg" width="600px" height="300"/> <img class="img" src="../图片/9d9376fa-b035-4bf3-9b95-0e2cd92f386e.jpg" width="600px" height="300" /> <img class="img" src="../图片/44ab5520-41e9-4bd7-bd0e-ea6dde13b89b.jpg" width="600px" height="300" /> <img class="img" src="../图片/77ecb4e3-1de5-4a4f-b165-400c59a71433.jpg" width="600px" height="300"/> <img class="img" src="../图片/85a669b8-879e-40c8-95e8-487854bde435.jpg" width="600px" height="300" /> </div> <div id="dian"> <div bs="0" class="yuan" onclick="xianshi(this,'0')"></div> <div bs="1" class="yuan" onclick="xianshi(this,'1')"></div> <div bs="2" class="yuan" onclick="xianshi(this,'2')"></div> <div bs="3" class="yuan" onclick="xianshi(this,'3')"></div> <div bs="4" class="yuan" onclick="xianshi(this,'4')"></div> </div> </body> <script type="text/javascript"> //图片索引 var sy=0; //间隔时间 window.setInterval("Huan()","4000"); //掉一下换一个 function Huan() { var img=document.getElementsByClassName("img"); sy++; //索引加1 //判断到了最后一张 if(sy>=img.length) { sy=0; } //让所有隐藏 for(var i=0;i<img.length;i++) { img[i].style.display="none"; } //让下一张显示 img[sy].style.display="block"; //换圆点的样式 var yuan = document.getElementsByClassName("yuan"); for(var j=0;j<yuan.length;j++) { if(yuan[j].getAttribute("bs")==sy) { yuan[j].style.borderColor = "red"; } else { yuan[j].style.borderColor = "#0F6"; } } } function xianshi(t,s) { sy=s; var img = document.getElementsByClassName("img"); //让所有隐藏 for(var i=0;i<img.length;i++) { img[i].style.display="none"; } //让下一张显示 img[s].style.display="block"; //改自身样式 var yuan = document.getElementsByClassName("yuan"); for(var j=0;j<yuan.length;j++) { yuan[j].style.borderColor="#0F6"; } t.style.borderColor="red"; } </script>