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) {
		navAbout_over = newImage("img/nav/navAbout-over.gif");
		navMolds_over = newImage("img/nav/navMolds-over.gif");
		navPackaging_over = newImage("img/nav/navPackaging-over.gif");
		navEquip_over = newImage("img/nav/navEquip-over.gif");
		navIndustrial_over = newImage("img/nav/navIndustrial-over.gif");
		navResources_over = newImage("img/nav/navResources-over.gif");
		navContact_over = newImage("img/nav/navContact-over.gif");
		preloadFlag = true;
	}
}