Email address Validation

Question

1.00/5 (1 vote)

See more:

How to validate email address in javascript?
I have below function for validating email address

C#

function validateEmail(txtEmail) {
    //var a = document.getElementById(txtEmail).value;

    var filter = /^[a-zA-Z0-9_.-]+@[a-zA-Z0-9]+[a-zA-Z0-9.-]+[a-zA-Z0-9]+.[a-z]{0,4}$/;
    if (filter.test(txtEmail)) {
        return true;
    }
    else {
        return false;
    }

}

but it is not validating if i enter abc@xyz.com.com for this case it should return false currently it is returning true

Posted 19-Mar-12 2:20am

Syed Salman Raza Zaidi

Add a Solution

Comments

bbirajdar 19-Mar-12 9:10am

You need not correct it.. The validation is correct. It should validate the email ids like bbirajdar@yahoo.co.in ..with double (.) dots in the domain.. right ??

Sergey Alexandrovich Kryukov 19-Mar-12 20:25pm

So what? ...com.com is unusual but not formally invalid.
--SA

3 solutions

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

André Kraak · Answer 1 · 2012-03-19T02:38:00

Solution 4

http://www.regular-expressions.info/email.html[^] has a regex for validating an email address. There is also so comments on the shortcomings of this expression.

http://www.regular-expressions.info[^] wrote:
\b[A-Z0-9._%+-]+@[A-Z0-9.-]+\.[A-Z]{2,4}\b

Posted 19-Mar-12 2:38am

André Kraak

member60 · Answer 2 · 2012-03-19T02:33:00

Solution 2

try:

C#

function validateEmail(elementValue){
   var emailPattern = /^[a-zA-Z0-9._-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,4}$/;
   return emailPattern.test(elementValue);
 }

but i think nothing is wrong with your input too.

Posted 19-Mar-12 2:33am

member60

Updated 19-Mar-12 2:36am

v2

Comments

Syed Salman Raza Zaidi 19-Mar-12 8:35am

my pattern is fine but it is accepting dual .com ie abc@xyz.com.com

member60 19-Mar-12 8:37am

check if in place of .com if you entered anything else such as.xyz then also it will treat in same way for both .com and .xyz

Syed Salman Raza Zaidi 19-Mar-12 8:39am

still validating .com.com :(

Bojjaiah · Answer 3 · 2012-03-19T02:36:00

try this

C#

function chkEmail() {
            //testing regular expression
            var a = $("#email").val();
            var filter = /^[a-zA-Z0-9]+[a-zA-Z0-9_.-]+[a-zA-Z0-9_-]+@[a-zA-Z0-9]+[a-zA-Z0-9.-]+[a-zA-Z0-9]+.[a-z]{2,4}$/;
            //if it's valid email
            if ( filter.test( a ) ) {
               alert('coorect');
                return false;
            }
            else {
                alert( 'wrong' );
                return false;
            }
        }