// Define Images
		if (document.images) {
			cntcon = new Image();
				cntcon.src = "cntc-on.gif";
			homeon = new Image();
				homeon.src = "home-on.gif";
			projon = new Image();
				projon.src = "proj-on.gif";
			whoron = new Image();
				whoron.src = "whor-on.gif";
			artion = new Image();
				artion.src = "arti-on.gif";

			cntcoff = new Image();
				cntcoff.src = "cntc-off.gif";
			homeoff = new Image();
				homeoff.src = "home-off.gif";
			projoff = new Image();
				projoff.src = "proj-off.gif";
			whoroff = new Image();
				whoroff.src = "whor-off.gif";
			artioff = new Image();
				artioff.src = "arti-off.gif";
		}
// Activate Images
function imgOn(imgName) {
		if (document.images) {
			document[imgName].src = eval(imgName + "on.src");
		}
}
// Deactivate Images
function imgOff(imgName) {
		if (document.images) {
			document[imgName].src = eval(imgName + "off.src");
		}
}