随机生成验证码
2017-05-30 本文已影响0人
清茶杯
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title></title>
</head>
<body>
</body>
<script type="text/javascript">
var x=[];
for(i=65;i<=90;i++){
a=String.fromCharCode(i);
//a.push(a);
x.push(a);
}
//x=x.splice(x);
//document.write(x);
var s="";
for(i=0;i<4;i++){
var b=parseInt(Math.random()*(26));
var b=x[b];
//document.write(b);
s=s+b;
}
document.write(s);
</script>
</html>
