snav1 = new Image();
snav1.src = "images/snav_all1.gif";
snav1_hi = new Image();
snav1_hi.src = "images/snav_all1_hi.gif";

snav2 = new Image();
snav2.src = "images/snav_all2.gif";
snav2_hi = new Image();
snav2_hi.src = "images/snav_all2_hi.gif";

snav3 = new Image();
snav3.src = "images/snav_all3.gif";
snav3_hi = new Image();
snav3_hi.src = "images/snav_all3_hi.gif";