b0off = new Image();
b0off.src = "gfx/btn_of.jpg";
b0on = new Image();
b0on.src = "gfx/btn_of1.jpg";

b1off = new Image();
b1off.src = "gfx/btn_oferta.jpg";
b1on = new Image();
b1on.src = "gfx/btn_oferta1.jpg";

b2off = new Image();
b2off.src = "gfx/btn_or.jpg";
b2on = new Image();
b2on.src = "gfx/btn_or1.jpg";

b3off = new Image();
b3off.src = "gfx/btn_kontakt.jpg";
b3on = new Image();
b3on.src = "gfx/btn_kontakt1.jpg";


function myfun() {
	if (xmenu == 0) {
		document.gfx['b1'].src=b1off.src;
	}
}

function myfun2() {
	if (ymenu == 0) {
		document.gfx['b2'].src=b2off.src;
	}
}