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) {
		bienvenue_over = newImage("images/gif/menu/bienvenue-over.gif");
		tableaux_over = newImage("images/gif/menu/tableaux-over.gif");
		dessins_over = newImage("images/gif/menu/dessins-over.gif");
		ceramique_over = newImage("images/gif/menu/ceramique-over.gif");
		Illustrations_over = newImage("images/gif/menu/Illustrations-over.gif");
		artiste_over = newImage("images/gif/menu/artiste-over.gif");
		nouvelles_over = newImage("images/gif/menu/nouvelles-over.gif");
		livreOr_over = newImage("images/gif/menu/livreOr-over.gif");
		cartesPostales_over = newImage("images/gif/menu/cartesPostales-over.gif");
		liens_over = newImage("images/gif/menu/liens-over.gif");
		coordonnees_over = newImage("images/gif/menu/coordonnees-over.gif");
		preloadFlag = true;
	}
}