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_home_over = newImage("images/menu_home.gif");
		menu_sooji_over = newImage("images/menu_sooji.gif");
		menu_heal_over = newImage("images/menu_heal.gif");
		menu_health_over = newImage("images/menu_health.gif");
		menu_volun_over = newImage("images/menu_volun.gif");
		menu_user_over = newImage("images/menu_user.gif");
		menu_shop_over = newImage("images/menu_shop.gif");
		preloadFlag = true;
	}
}

function imgClear() {
	changeImages('menu_home','images/menu_home_off.gif','menu_sooji','images/menu_sooji_off.gif','menu_heal','images/menu_heal_off.gif','menu_health','images/menu_health_off.gif','menu_volun','images/menu_volun_off.gif','menu_user','images/menu_user_off.gif','menu_shop','images/menu_shop_off.gif');
}

function mouseOver(color,img) {
	BAR.style.backgroundColor = color;
	imgClear();
	changeImages(img,'images/' + img + '.gif');
}

function mouseOut(img) {
	BAR.style.backgroundColor = "";
	imgClear();
	changeImages(img,'images/' + img + '.gif');
}

preloadImages();