function opens(tis, val, sub) {
    var butt = document.getElementById(tis);
    butt.style.background="url( '" + sub + "img/alink.gif') top left repeat-x";
    butt.style.color="#FFFFFF";
    document.getElementById(val).style.display = 'block';
}
function closed(tis, val, sub) {
    var butt = document.getElementById(tis);
    butt.style.background="url( '" + sub + "img/link.gif') top left repeat-x";
    butt.style.color="#004200";
    document.getElementById(val).style.display = 'none';
}

function set_prov(pos) {
    document.getElementById('woj').selectedIndex = pos;
}