JavaScript Regular Expression Email Validation [duplicate]

Answer 1

Little late to the party, but here goes nothing...

function isEmailValid(emailAdress) {
    var EMAIL_REGEXP = new RegExp('^[a-z0-9]+(\.[_a-z0-9]+)*@[a-z0-9-]+(\.[a-z0-9-]+)*(\.[a-z]{2,15})$', 'i');
    return EMAIL_REGEXP.test(emailAdress)
}

http://jsfiddle.net/yrshaikh/xvd6H/