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Asked: 2026-06-15T10:11:57+00:00

Possible Duplicate: Using a regular expression to validate an email address I have just

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Possible Duplicate:
Using a regular expression to validate an email address

I have just made a RE for email address. Its a simplest one and works well. But i want to make it more better. I mean to say that, an email address can have alphanumeric characters, underscores “_”, dot “.” but it cannot contain hyphen “-“, semicolon “;” etc. Below is my RE that i have just made for email address.

<!DOCTYPE html>
<html>
<body>

<script>
str = "assad-ch7@Yahoo.com";

re = /[a-z0-9][@]((yahoo)|(hotmail)|(gmail))[.]((com)|(co.uk))/i; 


result = re.test(str);

document.write(result);

</script>

</body>
</html>

Furthermore, is this the right way to make an RE for an email address??

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1 Answer

  1. Editorial Team

    It’s not bad if you want to limit the email addresses to those domains. There are a few fixes though

    1. Need _ and . in first character class
    2. Add + after first character class to capture all characters before @
    3. Remove @ and . from character class brackets
    4. Remove unnecessary extra parenthesis
    5. Backslash literal periods (unnecessary inside character classes)

    var re = /[a-z0-9_.]+@(yahoo|hotmail|gmail)\.(com|co\.uk)/i;

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