<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>抽奖游戏</title> <style> #box{ width:720px; margin:0 auto; margin-top:20px; box-shadow:0px 0px 2px #333; } .pic{ width:200px; height:200px; float:left; line-height:200px; margin:10px; border:5px #fff solid; color:blue; font-size: 35px; text-align: center; } .anniu{ width:200px; height:200px; float:left; margin:10px; } #drawBtn{ color:red; font-size:30px; width:200px; height:200px; box-shadow:0px 0px 2px #333; font-weight: bold; } </style> <script> window.onload=init; var setting={ count:0, total:24, delay:20, picIndex:[0,1,2,4,7,6,5,3] } function init(){ document.getElementById("drawBtn").onclick=function(){ setting.count=0; setting.delay=20; this.disable=true;//禁用按钮 var drawBtn=this; //获取所有图片的div var allDivs=document.getElementsByClassName("pic"); //获得一个随机整数，代表中奖的那个位置，3*8+(0-7) setting.total+=Math.floor(Math.random()*allDivs.length); //设置定时器，依次修改每个div边框的颜色. setTimeout(function show(){ //重置上一个边框的颜色 for (var i=0;i<allDivs.length;i++){ allDivs[i].style.borderColor="#fff"; allDivs[i].style.opacity=0.7; } //找到要修改的那个边框的颜色设置 var currentPic=allDivs[setting.picIndex[setting.count%8]]; currentPic.style.borderColor="red"; currentPic.style.opacity=1.0; setting.count++; setting.delay+=2*setting.count; if(setting.count>setting.total){ alert("您中奖了，哈哈"); drawBtn.disable=false; return; } setTimeout(show,setting.delay); },setting.delay); } } </script> </head> <body> <div> <div>1</div> <div>2</div> <div>3</div> <div>4</div> <div><input type="button" value="我要抽奖"/></div> <div>5</div> <div>6</div> <div>7</div> <div>8</div> </div> </body> </html>
javascript跑马灯抽奖实例讲解
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