image1 = new Image();
image1.src = "/site/1/images/button_1_on.png";

image2 = new Image();
image2.src = "/site/1/images/button_2_on.png";

image3 = new Image();
image3.src = "/site/1/images/button_3_on.png";

image4 = new Image();
image4.src = "/site/1/images/button_4_on.png";

image4 = new Image();
image4.src = "/site/1/images/button_5_on.png";