function sprawdzPola(strPola)
{
    ok = true;
    pola = strPola.split(',');
    for (i=0; i<pola.length; i++)
    {
        elem = document.getElementById(pola[i]);
        if (elem.value=='')
        {
            ok = false;
            elem.className = "required"
        }
        else
            elem.className = ""
    }
    return ok;
}