image1 = new Image();
image1.src = "images/a_03_on.gif";

image2 = new Image();
image2.src = "images/a_04_on.gif";

image3 = new Image();
image3.src = "images/a_05_on.gif";

image4 = new Image();
image4.src = "images/a_06_on.gif";

image5 = new Image();
image5.src = "images/a_07_on.gif";

image6 = new Image();
image6.src = "images/a_08_on.gif";

image7 = new Image();
image7.src = "images/a_09_on.gif";