<!-- 
if (document.images) {
img1on=new Image();
img1on.src="images/nav/nav1on.gif";
img2on=new Image();
img2on.src="images/nav/nav2on.gif";
img3on=new Image();
img3on.src="images/nav/nav3on.gif";

img1off=new Image();
img1off.src="images/nav/nav1.gif";
img2off=new Image();
img2off.src="images/nav/nav2.gif";
img3off=new Image();
img3off.src="images/nav/nav3.gif";

}
function imgon(imgName) { if (document.images) { document[imgName].src = eval(imgName + "on.src"); } }
function imgoff(imgName) { if (document.images) { document[imgName].src = eval(imgName + "off.src"); } }
// -->