g改造轮播图1：https://www.cnblogs.com/huanghuali/p/8677338.html
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>轮播图</title> <!-- <link rel="stylesheet" type="text/css" href="css/style.css"> --> <script type="text/javascript" src="https://cdn.bootcss.com/jquery/3.2.1/jquery.min.js"></script> <!-- <script type="text/javascript" src="js/lunbo.js"></script> --> <style type="text/css"> *{ margin: 0; padding: 0; } body { font-size: 14px; line-height: 1.5; font-family: 'Microsoft Yahei', 'arial', 'tahoma', 'simsun'; color: #666; background-color: #fff } img { border: 0; } a { text-decoration: none; color: #666; } .wrapper_lb { position: relative; width: 640px; height: 480px; } .lb_pic_list a { position: absolute; display: block; } .lb_pic_list a img { width: 640px; height: 480px; display: block; } .arrow_left { position: absolute; top: 50%; margin-top: -18px; left: 10px; background: red; width: 80px; height: 30px; color: #fff; } .arrow_right { position: absolute; top: 50%; margin-top: -18px; right: 10px; background: red; width: 80px; height: 30px; color: #fff; } .scoll_dot{ overflow: hidden; text-align: center; position: absolute; bottom:0; z-index: 9; } .scoll_dot i{ width: 16px; height: 6px; background: blue; margin:0 3px; display: inline-block; cursor: pointer;} .scoll_dot .active{ background-color: red } </style> </head> <body> <div class="wrapper_lb"> <div class="lb_pic_list" id="scrollWrap"> <a href="javascript:;" class="J_pic"><img src="https://img.d1xz.net/d/2018/12/5c10a30eb359a.jpg" alt="1"></a> <a href="javascript:;" class="J_pic"><img src="https://img.d1xz.net/d/2018/12/5c10a2bd253bd.jpg" alt="2"></a> <a href="javascript:;" class="J_pic"><img src="https://img.d1xz.net/d/2018/12/5c10a321a708b.jpg" alt="3"></a> </div> <div class="scoll_dot J_bannerPage"></div> <div class="arrow_left J_arrow">向左</div> <div class="arrow_right J_arrow">向右</div> </div> <script type="text/javascript"> $(function() { var index = 0; var timer; //获取id为scrollWrap 所有的img var imgList = $('#scrollWrap .J_pic'); //img的个数 var imgNum = imgList.length; if(imgNum>1){ //第一张图显示 $('.J_pic').eq(0).show().siblings().hide(); $('.J_pic').mouseover(function(){ clearInterval(timer); //鼠标经过停止自动播放 }); $('.J_pic').mouseout(function(){ showTime(); //鼠标离开继续自动播放 }); //点击向左按钮 $('.arrow_left').click(function() { clearInterval(timer); if (index == 0) { index = imgNum; } index--; showBg(); showTime(); }); //点击向右按钮 $('.arrow_right').click(function() { clearInterval(timer); if (index == imgNum - 1) { index = -1; } index++; showBg(); showTime(); }); // 填充分页 var bPage=$(".wrapper_lb").find('.J_bannerPage'); var html=''; for(var i=0,max=imgNum;i<max;i++){ html+=(i==0)?'<i class="active"></i>':'<i></i>'; } bPage.append(html); // //鼠标点击分页 bPage.children('i').on('click',function(){ index=$(this).index(); showBg(); }) function showBg() { $('.J_pic').eq(index).fadeIn(300).siblings().fadeOut(300); bPage.children('i').eq(index).addClass('active').siblings().removeClass('active'); } function showTime() { timer = setInterval(function() { index++; // if (index == imgNum) { // index = 0; // } index=(index==imgNum)?0:index; showBg(); }, 2000); } //自动播放图片 showTime(); } }); </script> </body> </html>