大佬们我的想法是在下面建四个.xia的img 先不设置src，先设个变量zons为0，然后获取img的class $(“.xia:eq(zons)") 然后再用attr来改src设置为随机数抽到的数组元素，再之后设置zons变量初始化为0 自增到3也就是.xia的下标一个一个来设置四个img的图片路径，可下面这样报错怎么办啊，大佬求助QWQ<!DOCTYPE html><html> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>jquery随机抽奖 </title> <head> <script type="text/javascript" src="jq/jquery-3.1.1.js"></script></script> <script type="text/javascript"> $(function(){ var alldata = new Array("img/2.jpg","img/3.jpg","img/4.jpg","img/5.jpg"); var show = $("#show") var start = $("#start"); var btn = $("#btn"); var randomVal; var nums = 4; var zons = 0; var zon = $("#zon") var open = false; zon.append(nums); function change(){ var num = alldata.length - 1; randomVal = Math.round(Math.random() * num); var prizeName = alldata[randomVal]; start.attr("src",prizeName); } function run(){ if(!open){ timer=setInterval(change,30); btn.removeClass('start').addClass('stop').text('停止'); show.animate({bottom:"50px"},300); show.animate({bottom:"0px"},300); if (nums<1) { btn.removeClass('start').addClass('end').text('谢谢'); start.attr("src","img/6.jpg"); } open = true; }else{ clearInterval(timer); btn.removeClass('stop').addClass('start').text('开始抽奖'); show.animate({bottom:"50px"},300); show.animate({bottom:"0px"},300); if (nums<2) { btn.removeClass('stop').addClass('end').text('谢谢'); } goon(); select(); open = false; } } function goon() { nums--; if (nums<0) { nums=0; } zon.html("总计"+"："+nums); alldata.splice(randomVal,1); } function select() { zons++; if (zons>3) { zons=3; } console.log(zons); $(".xia:eq(zons)").attr("src",prizeName); } btn.click(function(){run();}) }) </script> <style> body{ background:#fff;} .main{ width: 1000px; height: 800px; border: 1px solid red; margin: 0 auto; } .wrap{ width:300px; margin:100px auto; font-family:"微软雅黑"; border: 1px solid red;} .show{ width:300px; height:300px; background-color:#ff3300; line-height:300px; text-align:center; color:#fff; font-size:28px; -moz-border-radius:150px; -webkit-border-radius:150px; border-radius:150px; background-image: -webkit-gradient(linear,0% 0%, 0% 100%, from(#FF9600), to(#F84000), color-stop(0.5,#fb6c00)); -moz-box-shadow:2px 2px 10px #BBBBBB; -webkit-box-shadow:2px 2px 10px #BBBBBB; box-shadow:2px 2px 10px #BBBBBB;overflow: hidden; position: relative;} .btn a{ display:block; width:120px; height:50px; margin:30px auto; text-align:center; line-height:50px; text-decoration:none; color:#fff; -moz-border-radius:25px; -webkit-border-radius:25px; border-radius:25px;} .btn a.start{ background:#80b600;} .btn a.start:hover{ background:#75a700;} .btn a.stop{ background:#00a2ff;} .btn a.stop:hover{ background:#008bdb;} .btn a.end{background: orange;} .bottom{border:1px solid red; width: 800px; height: 100px; margin: 100px;} .xia{-moz-border-radius:150px; -webkit-border-radius:150px; border-radius:150px; border: 1px solid red; margin-left: 80px; overflow: hidden;} </style> </head> <body> <div class="main"> <div class="wrap"> <div class="show" id="show"><img id="start" src="img/1.jpg" width="300" height="300"></div> <div class="btn"> <a href="javascript:void(0)" class="start" id="btn">开始抽奖</a> </div> <div style="text-align:center;clear:both"> <p id="zon">总计：</p> </div> </div> <div class="bottom"><img class="xia" src="" width="100" height="100"><img class="xia" src="" width="100" height="100"><img class="xia" src="" width="100" height="100"><img class="xia" src="" width="100" height="100"></div> </div> </body></html>
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