// preload images:
if (document.images) {
back = new Image(); back.src = "../images/back.jpg";
backout = new Image(); backout.src = "../images/backout.jpg";

top1 = new Image(); top1.src = "../images/top1.jpg";
top1out = new Image(); top1out.src = "../images/top1out.jpg";

forward = new Image(); forward.src = "../images/forward.jpg";
forwardout = new Image(); forwardout.src = "../images/forwardout.jpg";
}

function hiLite(imgName,imgObjName) {
if (document.images) {
  document.images[imgName].src = eval(imgObjName + ".src");
}}