function roll_over(e, img_src)
{
		newImage = "url(images/"+img_src+")";
        e.style.backgroundImage = newImage;
}
function otworz(adres) {
noweOkno = window.open(adres, 'okienko', 'menubar=no, toolbar=no, location=no, scrollbars=no, resizable=no, status=no, width=500, height=500')
}