<!doctype html>
<html>
<head>
<meta charset="utf-8"/>
<title>js验证码</title>
<style type="text/css">
#login{
width:50px;
height:30px;
line-height:30px;
margin:0 auto;
background-color:#eee;
text-align:center;
color:red;
}
p{
width:75px;
height:30px;
margin:0 auto;
}
</style>
</head>
<body>
<p>验证码:</p>
<div id="login" onclick="show()"><a href="#"></a></div>
<script type="text/javascript">
function codes(n){
var a="azxcvbnmsdfghjklqwertyuiopZXCVBNMASDFGHJKLQWERTYUIOP0123456789";
var b="";
for (var i = 0;i<n;i++){
var index=Math.floor(Math.random()*62);
b+=a.charAt(index);
}
return b;
};
function show(){
document.getElementById("login").innerHTML=codes(4);
}
window.onload=show;
</script>
</body>
</html>
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最新推荐文章于 2022-04-06 14:36:49 发布