img1on = new Image();
img1on.src = "images/about-over.jpg";
img2on = new Image();
img2on.src = "images/who-over.jpg";
img3on = new Image();
img3on.src = "images/process-over.jpg";
img4on = new Image();
img4on.src = "images/results-over.jpg";
img5on = new Image();
img5on.src = "images/links-over.jpg";
img6on = new Image();
img6on.src = "images/contact-over.jpg";

img1off = new Image();
img1off.src = "images/about.jpg";
img2off = new Image();
img2off.src = "images/who.jpg";
img3off = new Image();
img3off.src = "images/process.jpg";
img4off = new Image();
img4off.src = "images/results.jpg";
img5off = new Image();
img5off.src = "images/links.jpg";
img6off = new Image();
img6off.src = "images/contact.jpg";

function imgOn(imgName) {
	document[imgName].src = eval(imgName + "on.src");
}

function imgOff(imgName) {
	document[imgName].src = eval(imgName + "off.src");
}