function checkEmail(email) {
    var reg = /^([A-Za-z0-9_\-\.])+\@([A-Za-z0-9_\-\.])+\.([A-Za-z]{2,4})$/;
    if (!reg.test(email)) return false;
    return true;
}

Use a regex to check the email address input

email validation

regex, email, javascript, validation

JavaScript