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) {
		var modern = newImage("/site_images/nav/modern_on.gif")
		var traditional = newImage("/site_images/nav/traditional_on.gif")
		var commercial = newImage("/site_images/nav/commercial_on.gif");
		var progress = newImage("/site_images/nav/progress_on.gif");
		var awards = newImage("/site_images/nav/awards_on.gif");
		var resources = newImage("/site_images/nav/resources_on.gif");
		var contact = newImage("/site_images/nav/contact_on.gif");
		var home = newImage("/site_images/nav/home_on.gif");
		
		preloadFlag = true;
	}
}