if (document.images) {

	img1on = new Image();
		img1on.src = "/images/nav-about-on.gif";

	img2on = new Image();
		img2on.src = "/images/nav-prog-on.gif";
		
	img3on = new Image();
		img3on.src = "/images/nav-careers-on.gif";


	img1off = new Image();
		img1off.src = "/images/nav-about-off.gif";

	img2off = new Image();
		img2off.src = "/images/nav-prog-off.gif";
		
	img3off = new Image();
		img3off.src = "/images/nav-careers-off.gif";
	
	}



// Function to 'activate' images.

function imgOn(imgName){

	if (document.images){

		document[imgName].src = eval(imgName + "on.src");

		}

	}



// Function to 'deactivate' images.

function imgOff(imgName){

	if (document.images){

		document[imgName].src = eval(imgName + "off.src");

		}

	}

// -->