function sw(i){
    var d = document.getElementById(i);
    if (d){ d.style.display = (d.style.display == "block") ? "none" : "block"; }
} 
function validateForm(AForm){
    if (AForm.imie.value == '') {
        AForm.imie.style.borderColor = 'red';
        alert("Wpisz imię i nazwisko!");
        AForm.imie.focus();
        return false;
    } else if (AForm.email.value == '') {
        AForm.email.style.borderColor = 'red';
        alert("Wpisz adres email!");
        AForm.email.focus();
        return false;
    } else if (AForm.wiadomosc.value == '') {
        AForm.wiadomosc.style.borderColor = 'red';
        alert("Wpisz wiadomość!");
        AForm.wiadomosc.focus();
        return false;
    }
    return true;
}