Validate email address textbox using JavaScript

Question

I have a requirement to validate an email address entered when a user comes out from the textbox.
I have googled for this but I got form validation JScript; I don\'t wa

Answer 1

Assuming your regular expression is correct:

inside your script tags

function validateEmail(emailField){
        var reg = /^([A-Za-z0-9_\-\.])+\@([A-Za-z0-9_\-\.])+\.([A-Za-z]{2,4})$/;

        if (reg.test(emailField.value) == false) 
        {
            alert('Invalid Email Address');
            return false;
        }

        return true;

}

in your textfield: