image1 = new Image();
image1.src = "images/nav_1_r.gif";

image2 = new Image();
image2.src = "images/nav_2_r.gif";

image3 = new Image();
image3.src = "images/nav_3_r.gif";

image4 = new Image();
image4.src = "images/nav_4_r.gif";

image5 = new Image();
image5.src = "images/nav_5_r.gif";

image6 = new Image();
image6.src = "images/nav_6_r.gif";

image7 = new Image();
image7.src = "images/nav_7_r.gif";