img1on = new Image();
img1on.src = "_images/designElements/nav01on.gif";
img1off = new Image();
img1off.src = "_images/designElements/nav01.gif";

img2on = new Image();
img2on.src = "_images/designElements/nav02on.gif";
img2off = new Image();
img2off.src = "_images/designElements/nav02.gif";

img3on = new Image();
img3on.src = "_images/designElements/nav03on.gif";
img3off = new Image();
img3off.src = "_images/designElements/nav03.gif";

img4on = new Image();
img4on.src = "_images/designElements/nav04on.gif";
img4off = new Image();
img4off.src = "_images/designElements/nav04.gif";

img5on = new Image();
img5on.src = "_images/designElements/nav05on.gif";
img5off = new Image();
img5off.src = "_images/designElements/nav05.gif";

img6on = new Image();
img6on.src = "_images/designElements/nav06on.gif";
img6off = new Image();
img6off.src = "_images/designElements/nav06.gif";

img7on = new Image();
img7on.src = "_images/designElements/nav07on.gif";
img7off = new Image();
img7off.src = "_images/designElements/nav07.gif";

img8on = new Image();
img8on.src = "_images/designElements/nav08on.gif";
img8off = new Image();
img8off.src = "_images/designElements/nav08.gif";

function imgon(imgName){
	document[imgName].src = eval(imgName + 'on.src');
}
	
function imgoff(imgName){
	document[imgName].src = eval(imgName + "off.src");
}