使用正则表达式。
9位数字是/^\d{9}$/
电子邮件看似简单,但实际上相当复杂,尤其是考虑到 IDN 字符
例如,почта@макс.укр
是有效且有效的电子邮件地址。您实际上可以使用它通过电子邮件发送给我 :-) 不幸的是,许多网站并未将其验证为有效的电子邮件地址
http://ex-parrot.com/~pdw/Mail-RFC822-Address.html
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