aboutoff = new Image;(130,26)
aboutoff.src = "images/about.gif";
abouton = new Image;(130,26)
abouton.src = "images/about-on.gif";

workoff = new Image;(111,26)
workoff.src = "images/work.gif";
workon = new Image;(111,26)
workon.src = "images/work-on.gif";

philosophyoff = new Image;(144,26)
philosophyoff.src = "images/philosophy.gif";
philosophyon = new Image;(144,26)
philosophyon.src = "images/philosophy-on.gif";

servicesoff = new Image;(123,26)
servicesoff.src = "images/services.gif";
serviceson = new Image;(123,26)
serviceson.src = "images/services-on.gif";

// swap images using the cached images
function imgSwap(x, y)
{
	document.images[x].src=eval(y+'.src');
}