<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title></title>
</head>
<body>
<script type="text/javascript">
var account = ‘maoyuxuanshigede‘;
if(account.length < 3 || account.length > 10){
document.write(‘您的账号或者密码有误，账号长度应该为3~10之间，密码为3~16之间‘+"<br />")
}
if(account.toLowerCase().indexOf(‘mao‘) !== -1){
document.write(‘用户名不能包含敏感词‘)
}
</script>
</body>
</html>
原文：https://www.cnblogs.com/jiaqi818/p/12739652.html