Use JS to create a random lottery draw
This time I will bring you the use of JS to make a random carousel lottery. What are the precautions for using JS to make a random carousel lottery. The following is a practical case, let’s take a look.
Rendering:
Picture material:
The code is as follows, copy and use:
<!DOCTYPE html>
<html>
<head lang="en">
<meta charset="UTF-8">
<title>幸运抽奖页面</title>
<style>
/*CSS代码*/
*{
padding:0;
margin:0;
}
.login-box{
width:500px;
height:430px;
/* border:1px solid red;*/
/*水平居中*/
margin:100px auto;
<!-- 此处需要修改为自己的图片路径 -->
background: url(img/tx1.png) no-repeat;
box-shadow: 0 0 2px rgba(0,0,0,.5);
}
.login{
padding:5px;
border:0 none;
background: #0a88e1;
color: white;
font-size:12px;
text-align: center;
width:220px;
line-height: 20px;
margin-top:200px;
margin-left:120px;
}
</style>
</head>
<body>
<p class="login-box">
<input type="button" value="点击开始抽奖" class="login" id="luckbtn" onclick="luck()"/>
</p>
</body>
<script>
//JS代码：幸运抽奖
var no = prompt("请输入您的四位会员卡号：");
//获取到抽奖按钮
document.getElementById("luckbtn").value =no+"-欢迎你，点击开始抽奖" ;
//当点击抽奖按钮的时候调用，幸运抽奖的规则及提醒，功能 function 函数
function luck(){
//系统随机生成一个0-10之间的随机整数 :Math.random() 0-1之间的浮点数
var num = parseInt(Math.random()*10);
/*alert(num);*/
//随机数=会员卡号的百位数
/* var gewei = no%10;
alert(gewei);*/
/*var shiwei = parseInt(no/10%10);
alert(shiwei);*/
var baiwei = parseInt(no/100%10);
/*alert(baiwei);*/
if(baiwei == num){
alert("恭喜"+no+",您中奖了！");
}else{
alert("对不起，"+no+"，您没有中奖！");
}
}
</script>
</html>I believe you have mastered the method after reading the case in this article. For more exciting information, please pay attention to other related articles on the php Chinese website!
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The above is the detailed content of Use JS to create a random lottery draw. For more information, please follow other related articles on the PHP Chinese website!
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