var imageRoot = '/images/';
var preloadFlag = false;

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 = imageRoot + changeImages.arguments[i+1];
		}
	}
}

function preloadImages() {
	if (document.images) {
		news_o = newImage(imageRoot + "bt_news_o.png");
		links_o = newImage(imageRoot + "bt_links_o.png");
		donations_o = newImage(imageRoot + "bt_donations_o.png");
		gallery_o = newImage(imageRoot + "bt_gallery_o.png");
		messageboard_o = newImage(imageRoot + "bt_messageboard_o.png");
		contact_o = newImage(imageRoot + "bt_contact_o.png");
		pets_o = newImage(imageRoot + "bt_pets_o.png");
		store_o = newImage(imageRoot + "bt_store_o.png");


preloadFlag = true;
	}
}