function js_flipMenuRO(item) {
	itemNO = "content-level0-menu-" + item + "-NO";
	itemRO = "content-level0-menu-" + item + "-RO";
	js_blendItem(itemNO, itemRO);
}

function js_blendItem(itemNameFrom, itemNameTo) {
	itemFrom = document.getElementById(itemNameFrom);
	itemTo = document.getElementById(itemNameTo);
	itemFrom.style.display = "none";
	itemTo.style.display = "block";
}