if (document.images) {

a1 = new Image(60,15); a1.src = "img/nav/home1.gif";
a2 = new Image(60,15); a2.src = "img/nav/home2.gif";

b1 = new Image(60,15); b1.src = "img/nav/company1.gif";
b2 = new Image(60,15); b2.src = "img/nav/company2.gif";

c1 = new Image(60,15); c1.src = "img/nav/quali1.gif";
c2 = new Image(60,15); c2.src = "img/nav/quali2.gif";

d1 = new Image(60,15); d1.src = "img/nav/prod1.gif";
d2 = new Image(60,15); d2.src = "img/nav/prod2.gif";

e1 = new Image(60,15); e1.src = "img/nav/service1.gif";
e2 = new Image(60,15); e2.src = "img/nav/service2.gif";

f1 = new Image(60,15); f1.src = "img/nav/contact1.gif";
f2 = new Image(60,15); f2.src = "img/nav/contact2.gif";
}

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