img1on = new Image();	img1on.src = "mark-knob-2.jpg";
img2on = new Image();	img2on.src = "walt-knob-2.jpg";
img3on = new Image();	img3on.src = "lorrie-knob-2.jpg";
img4on = new Image();	img4on.src = "mike-knob-2.jpg";
img5on = new Image();	img5on.src = "jim-knob-2.jpg";

img1off = new Image();	img1off.src = "mark-knob.jpg";
img2off = new Image();	img2off.src = "walt-knob.jpg";
img3off = new Image();	img3off.src = "lorrie-knob.jpg";
img4off = new Image();	img4off.src = "mike-knob.jpg";
img5off = new Image();	img5off.src = "jim-knob.jpg";

function imgOn(w) {
	document.images[w].src = eval(w + "on.src");
	}
function imgOff(w) {
	document.images[w].src = eval(w + "off.src");
	}