Don't have Telegram yet? Try it now!
https://tetzzang.com/javascript-%ec%a0%95%ea%b7%9c%ec%8b%9d%ec%9d%84-%ec%9d%b4%ec%9a%a9%ed%95%9c-id-pw-%ea%b2%80%ec%82%ac/
[JavaScript] 정규식을 이용한 ID / PW 검사