var mn = new Array("img0","img1","img2","img3","img4","img5","img6","img7","img8","img9","img10","img11");
	var jmena = new Array("o01","o02","o03","o04","o05","o06","o07","o08","o09","o10","o11","o12");
	var img_on = new Array(mn.length);
	var img_off = new Array(mn.length);
	for (var i = 0; i < mn.length; i++) {
			img_off[i] = new Image();
			img_off[i].src = "i/" + jmena[i] + ".jpg";
			img_on[i] = new Image();
			img_on[i].src = "i/" + jmena[i] + "_on.jpg";
	}
	var menu_cislo=null; // blokace onmouseover tlacítka
	function aktivace() {
			document.images[mn[menu_cislo]].src = img_on[menu_cislo].src;
	}
	function off(cislo) {
			if (menu_cislo != cislo) document.images[mn[cislo]].src = img_off[cislo].src;
	}
	function on(cislo) {
			if (menu_cislo != cislo) document.images[mn[cislo]].src = img_on[cislo].src;
	}

	function odkaz_ven(adresa) {
		window.open(adresa);
	}