PreImage1 = new Image(30,35);
PreImage1.src = "images/btnHomeOn.gif";
PreImage2 = new Image(50,35);
PreImage2.src = "images/btnContactsOn.gif";
PreImage3 = new Image(100,35);
PreImage3.src = "images/btnMapOn.gif";
PreImage4 = new Image(113,36);
PreImage4.src = "images/btnCarsOn.gif";