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("images/home-over.gif");
		home_down = newImage("images/home-down.gif");
		sidemenu_02_home_over = newImage("images/sidemenu_02-home_over.gif");
		sidemenu_02_home_down = newImage("images/sidemenu_02-home_down.gif");
		artwork_over = newImage("images/artwork-over.gif");
		artwork_down = newImage("images/artwork-down.gif");
		sidemenu_04_artwork_over = newImage("images/sidemenu_04-artwork_over.gif");
		sidemenu_04_artwork_down = newImage("images/sidemenu_04-artwork_down.gif");
		CV_over = newImage("images/CV-over.gif");
		CV_down = newImage("images/CV-down.gif");
		sidemenu_06_CV_over = newImage("images/sidemenu_06-CV_over.gif");
		sidemenu_06_CV_down = newImage("images/sidemenu_06-CV_down.gif");
		biography_over = newImage("images/biography-over.gif");
		biography_down = newImage("images/biography-down.gif");
		sidemenu_08_biography_over = newImage("images/sidemenu_08-biography_over.gif");
		sidemenu_08_biography_down = newImage("images/sidemenu_08-biography_down.gif");
		articles_over = newImage("images/articles-over.gif");
		articles_down = newImage("images/articles-down.gif");
		sidemenu_10_galleries_over = newImage("images/sidemenu_10-galleries_over.gif");
		sidemenu_10_galleries_down = newImage("images/sidemenu_10-galleries_down.gif");
		galleries_over = newImage("images/galleries-over.gif");
		galleries_down = newImage("images/galleries-down.gif");
		sidemenu_12_galleries_over = newImage("images/sidemenu_12-galleries_over.gif");
		sidemenu_12_galleries_down = newImage("images/sidemenu_12-galleries_down.gif");
		preloadFlag = true;
	}
}