obr1 = new Image();
obr1.src="../img/main/menu_on.gif";

obr2 = new Image();
obr2.src="../img/main/puzzle_on.gif";

obr3 = new Image();
obr3.src="../img/main/internet_on.gif";

obr4 = new Image();
obr4.src="../img/main/obalka_on.gif";