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_historique_over = newImage("../images/bt_historique_over.gif");
		bt_defi_over = newImage("../images/bt_defi_over.gif");
		bt_blogue_over = newImage("../images/bt_blogue_over.gif");
		bt_forum_over = newImage("../images/bt_forum_over.gif");
		bt_photos_over = newImage("../images/bt_photos_over.gif");
		bt_videos_over = newImage("../images/bt_videos_over.gif");
		bt_participez_over = newImage("../images/bt_participez_over.gif");
		bt_partenaires_over = newImage("../images/bt_partenaires_over.gif");
		bt_apropos_over = newImage("../images/bt_apropos_over.gif");
		bt_salledepresse_over = newImage("../images/bt_salledepresse_over.gif");
		preloadFlag = true;
	}
}