function newImage(arg) {
	if (document.images) {
		rslt = new Image();
		rslt.src = arg;
		return rslt;
	}
}

function changeImages() {
	if (document.images && (preloadFlag == true)) {
		for (var i=0; i<changeImages.arguments.length; i+=2) {
			document[changeImages.arguments[i]].src = changeImages.arguments[i+1];
		}
	}
}

var preloadFlag = false;
function preloadImages() {
	if (document.images) {
		electrodes_link_over = newImage("images/electrodes_link-over.gif");
		graphite_link_over = newImage("images/graphite_link-over.gif");
		carbon_link_over = newImage("images/carbon_link-over.gif");
		corporate_link_over = newImage("images/corporate_link-over.gif");
		employment_link_over = newImage("images/employment_link-over.gif");
		contact_link_over = newImage("images/contact_link-over.gif");
		people_link_over = newImage("images/people_link-over.jpg");
		values_link_over = newImage("images/values_link-over.jpg");
		facility_link_over = newImage("images/facility_link-over.jpg");
		quality_link_over = newImage("images/quality_link-over.jpg");
		preloadFlag = true;
	}
}