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) {
		home_over = newImage("home_over.gif");
		about_over = newImage("about_over.gif");
		b4uvisit_over = newImage("b4uvisit_over.gif");
		trail_over = newImage("trail_over.gif");
		faq = newImage("faq_over.gif");
		credits_over = newImage("credits_over.gif");
		site_over = newImage("site_over.gif");
		forward_over = newImage("forward2_over.gif");
		backward_over = newImage("back2_over.gif");
		along_over = newImage("along_over.gif");
		redwoods_over = newImage("redwoods_over.gif");
		main_over = newImage("trail_people_150x223.jpg");
		mag_og_over = newImage("mag_og_over.gif");
		fairy_over = newImage("fairy_over.gif");
		granary_over = newImage("granary_over.gif");
		pourroy_over = newImage("pourroy_garden_over.gif");
		smileyface_over = newImage("smileyface_over.gif");
		biground_over = newImage("biground_over.gif");
		goosepen_over = newImage("goosepen_over.gif");
		preloadFlag = true;
	}
}