var preloadFlag = false;

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];
		}
	}
}

function preloadImages() {
	if (document.images) {
		Menu_Part06_over = newImage("images/Menu_Part06-over.gif");
		Menu_Part01_over = newImage("images/Menu_Part01-over.gif");
		Menu_Part05_over = newImage("images/Menu_Part05-over.gif");
		Menu_Part02_over = newImage("images/Menu_Part02-over.gif");
		Menu_Part04_over = newImage("images/Menu_Part04-over.gif");
		Menu_Part03_over = newImage("images/Menu_Part03-over.gif");
		preloadFlag = true;
	}
}