<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>18-正则表达式</title>
</head>
<body>
<script>
//规则: 单词字符,6~12
var reg=/^\w{6,12}$/;
var str="abcccc";
var flag = reg.test(str);
alert(flag);
</script>
</body>
</html>