Regex for email confirmation

Question

I'm using the following code to make sure fields are filled in. How can I add some code to make sure it's a valid email?

function verify() {
if ($("#ddlBusinessName").val() == "0") {
            alert("Please select the name.");
        }
        else if ($("#txtEmail").val().length <= 0 || $("#txtEmailConfirm").val().length <= 0) {
            alert("Please enter the email address and confirm the email address.");
             else if ($("#TxtPassword").val().length <=0 || $("#TxtConfirmPassword").val().length <=0) {
            alert("Please enter your password.");
        }

         }

EDIT How can I implement this into my code though?

 function validateEmail(email) { 
var re = /^(([^<>()[\]\\.,;:\s@\"]+(\.[^<>()[\]\\.,;:\s@\"]+)*)|(\
".+\"))@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\])|(([a-zA
-Z\-0-9]+\.)+[a-zA-Z]{2,}))$/;
return re.test(email);
}

you are never going to fully validate an email address with regular expressions. find a library that will validate it for you. — lincolnk, Jan 27 '12 at 20:24
Have you searched a bit on Stackoverflow? http://stackoverflow.com/search?q=validate+email+regex&submit=search — Don Roby, Jan 27 '12 at 20:25
possible duplicate of [Validate email address in Javascript?](http://stackoverflow.com/questions/46155/validate-email-address-in-javascript) — Don Roby, Jan 27 '12 at 20:27
Here's an example of a quite complete regex for email btw: http://www.ex-parrot.com/~pdw/Mail-RFC822-Address.html — talnicolas, Jan 27 '12 at 20:45

score 1 · Answer 1 · edited May 23 '17 at 11:43

1

I just answered a similar question. https://stackoverflow.com/a/12674524/340736

For your client-side validation I would recommend that you use Verimail.js. It validates your e-mail address against a RFC 822 regular expression, but also a full list of all registered TLD's.

edited May 23 '17 at 11:43

Community

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answered Oct 01 '12 at 13:54

Robin Orheden

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score 1 · Accepted Answer · edited May 23 '17 at 11:48

1

The only safe way to validate an email address is actually sending an email to it. If this fails with a (permanent - graylisting errors would be temporary) error code you know the address is invalid.

Of course you cannot do that in JavaScript - so I'd limit the client-side check to a very simple check - something like /^[^@ ]+@[^@ ]+\.[^@ ]+$/ (thx @NedBatchelder) would do the job.

edited May 23 '17 at 11:48

Community

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answered Jan 27 '12 at 20:38

ThiefMaster

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score 0 · Answer 3 · answered Jan 27 '12 at 20:22

0

Try RegExpLib Site Reference

Note that you're validating the email could exist, not that it does exist!

answered Jan 27 '12 at 20:22

Tim

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score 0 · Answer 4 · answered Jan 27 '12 at 20:25

0

Don't try to get too fancy with email address validation. Try this: Humane email validation.

answered Jan 27 '12 at 20:25

Ned Batchelder

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Regex for email confirmation

4 Answers4