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) {
		bt_03_over = newImage("img/bt_03-over.gif");
		bt_05_over = newImage("img/bt_05-over.gif");
		bt_07_over = newImage("img/bt_07-over.gif");
		bt_09_over = newImage("img/bt_09-over.gif");
		bt_11_over = newImage("img/bt_11-over.gif");
		bt_13_over = newImage("img/bt_13-over.gif");
		bt_15_over = newImage("img/bt_15-over.gif");
		gal_03_over = newImage("img/gallerylinks/gallery_03-over.gif");
		gal_05_over = newImage("img/gallerylinks/gallery_05-over.gif");
		gal_07_over = newImage("img/gallerylinks/gallery_07-over.gif");
		gal_09_over = newImage("img/gallerylinks/gallery_09-over.gif");
		gal_11_over = newImage("img/gallerylinks/gallery_11-over.gif");
		gal_13_over = newImage("img/gallerylinks/gallery_13-over.gif");
		preloadFlag = true;
	}
}