var mn1 = new Image(); 
mn1.src = "/img/predstavenie.gif";
var mn2 = new Image(); 
mn2.src = "/img/produkty.gif";
var mn3 = new Image(); 
mn3.src = "/img/referencie.gif";
var mn4 = new Image(); 
mn4.src = "/img/kontakt.gif";

var mn1up = new Image(); 
mn1up.src = "/img/predstavenie-up.gif";
var mn2up = new Image(); 
mn2up.src = "/img/produkty-up.gif";
var mn3up = new Image(); 
mn3up.src = "/img/referencie-up.gif";
var mn4up = new Image(); 
mn4up.src = "/img/kontakt-up.gif";