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) {
		mainimag_onet_over = newImage("images/mainimag-onet_over.jpg");
		mainimag_twot_over = newImage("images/mainimag-twot_over.jpg");
		mainimag_threet_over = newImage("images/mainimag-threet_over.jpg");
		mainimag_fourt_over = newImage("images/mainimag-fourt_over.jpg");
		mainimag_fivet_over = newImage("images/mainimag-fivet_over.jpg");
		mainimag_sixt_over = newImage("images/mainimag-sixt_over.jpg");
		mainimag_sevent_over = newImage("images/mainimag-sevent_over.jpg");
		mainimag_eightt_over = newImage("images/mainimag-eightt_over.jpg");
		mainimag_ninet_over = newImage("images/mainimag-ninet_over.jpg");
		mainimag_tent_over = newImage("images/mainimag-tent_over.jpg");
		mainimag_elevent_over = newImage("images/mainimag-elevent_over.jpg");
		mainimag_twelvet_over = newImage("images/mainimag-twelvet_over.jpg");
		mainimag_thirteent_over = newImage("images/mainimag-thirteent_over.jpg");
		mainimag_fourteent_over = newImage("images/mainimag-fourteent_over.jpg");
		mainimag_fifteent_over = newImage("images/mainimag-fifteent_over.jpg");
		preloadFlag = true;
	}
}