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) {
		map_01_grave_del_friuli_over = newImage("images/map_01-grave-del-friuli_ove.gif");
		map_01_Abruzzo_over = newImage("images/map_01-Abruzzo_over.gif");
		map_01_Le_Marche_over = newImage("images/map_01-Le-Marche_over.gif");
		map_01_Emilia_Romagna_over = newImage("images/map_01-Emilia-Romagna_over.gif");
		map_01_Piemonte_over = newImage("images/map_01-Piemonte_over.gif");
		map_01_Puglia_over = newImage("images/map_01-Puglia_over.gif");
		map_01_Toscana_over = newImage("images/map_01-Toscana_over.gif");
		map_01_Veneto_over = newImage("images/map_01-Veneto_over.gif");
		preloadFlag = true;
	}
}