function validateNewsletter(form) {
    var error = "";
    var hasErrors = false;
    var email = $("#mailId").attr('value');
    $('#submitErrors').remove();
    var emailReg = /^([A-Za-z0-9_\-\.])+\@([A-Za-z0-9_\-\.])+\.([A-Za-z]{2,4})$/;

    if(emailReg.test(email) == false) {
            hasErrors = true;
            error += "Virheellinen sähköposti";
        }

    if (hasErrors) {      
        $('.newsletterOrder').append('<div id="submitErrors" style="clear:both;text-align:left;"><p>'+error+'</p></div>');        
        return false;
    }
    document.newsletterForm.submit();
    return false;
}