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) {
		menu_01_over = newImage("images/menu/menu_01-over.gif");
		menu_02_over = newImage("images/menu/menu_02-over.gif");
		menu_03_over = newImage("images/menu/menu_03-over.gif");
		menu_04_over = newImage("images/menu/menu_04-over.gif");
		menu_05_over = newImage("images/menu/menu_05-over.gif");
		menu_06_over = newImage("images/menu/menu_06-over.gif");
		menu2_02_over = newImage("images/menu/menu2_02-over.gif");
		menu2_03_over = newImage("images/menu/menu2_03-over.gif");
		menu2_04_over = newImage("images/menu/menu2_04-over.gif");
		menu2_05_over = newImage("images/menu/menu2_05-over.gif");
		menu2_06_over = newImage("images/menu/menu2_06-over.gif");
		menu2_07_over = newImage("images/menu/menu2_07-over.gif");
		menu2_08_over = newImage("images/menu/menu2_08-over.gif");
		menu2_09_over = newImage("images/menu/menu2_09-over.gif");
		menu2_10_over = newImage("images/menu/menu2_10-over.gif");
		preloadFlag = true;
	}
}