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_recipe_over = newImage("../images/menu_recipe_over.jpg");
		menu_thai_recipe_over = newImage("../images/menu_thai_recipe.jpg");
		menu_healthy_recipe_over = newImage("../images/menu_healthy_recipe_over.jpg");
		menu_kids_recipe_over = newImage("../images/menu_kids_recipe_over.jpg");
		menu_ingredient_over = newImage("../images/menu_ingredient_over.jpg");
		menu_culinary_schools_over = newImage("../images/menu_culinary_schools_over.jpg");
		menu_travel_over = newImage("../images/menu_travel_over.jpg");
		menu_shopping_over = newImage("../images/menu_shopping_over.jpg");
		preloadFlag = true;
	}
}