email validation that will not accept underscore after the @

[neelmukhopadhya]

Hi,
all thanks in advance, i need a help immediately.

i need to create email validation function that will accept no underscore character after the @

Please help. its so urgent

[Rabbit]

Use a regular expression, or if you don't want to do that, you could follow this algorithm:

Find index of the @ character.
Substring out the character after that index.
Check to see if it's an underscore.

[Dormilich]

or just look if the address contains "@_".

[neelmukhopadhya]

function CheckEmail() {
            var email = document.getElementById('txtEmail');
            var filter = /^([a-zA-Z0-9_\.\-])+\@(([a-zA-Z0-9\-])+\.)+([a-zA-Z0-9]{2,4})+$/ ;
            if (!filter.test(email.value)) {
                alert('Please provide a valid email address');
                return false;
            }
            alert('email address is Ok');
            return true;
        }

this is working fine for me