<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>彩票</title>
<style type="text/css">
#wrap{
width: 300px;height: 150px;
border: 1px solid red;
margin: 100px auto 0px;
text-align: center;
position: relative;
}
#btn{
width: 100px;height: 50px;
font-size: 20px;
margin-top: 10px;
}
/*div{
display: inline-block;
}*/
#one div{
width: 50px;height: 50px;
border: 1px solid black;
display: inline-block;
margin-top: 50px;
line-height: 50px;
}
</style>
</head>
<body>
<div id="wrap">
<input type="button" name="" id="btn" value="随机一注">
<div id="one">
<div ></div>
<div ></div>
<div ></div>
<div ></div>
<div ></div>
</div>
</div>
<script type="text/javascript">
//获取元素
var btn = document.getElementById(‘btn‘)
var odiv = document.getElementById(‘one‘)
var div = one.getElementsByTagName(‘div‘)
//定义点击事件
btn.onclick = function(){
for(var i=0;i<div.length;i++){
var num = Math.floor(Math.random() * 100);
div[i].innerHTML=num;
if(div[i].innerHTML < 10){
div[i].innerHTML = ‘0‘+ div[i].innerHTML;
}
}
}
</script>
</body>
</html>
原文：http://www.cnblogs.com/llz1314/p/5777576.html