function isMail(mail) {
    return (new RegExp(/^\w+((-\w+)|(\.\w+))*\@[A-Za-z0-9]+((\.|-)[A-Za-z0-9]+)*\.[A-Za-z0-9]+$/).test(mail));
}

function isPostalCode(postalCode) {
    return (new RegExp(/^\d{6}$/).test(postalCode));
}

function isMobile(mobile) {
    return (new RegExp(/^\d{11}$/).test(mobile));
}