function flip() {
	var group_one = $$('ul#content_menu_one li');
	var group_two = $$('ul#content_menu_two li');
	Element.addClassName(group_one.last(),"last");
	Element.addClassName(group_two.last(),"last");
	Element.addClassName(group_one.first(),"first");
	Element.addClassName(group_two.first(),"first");
	var search_one = group_one.findAll(function(li) {
		return li.id == 'selected';
	});
	var search_two = group_two.findAll(function(li) {
 		return li.id == 'selected';
	});
	if (search_one.length==1) {
		//$('content_menu_two').innerHTML = "";
		//$('content_menu_one').innerHTML = "";
		group_one.each(function(li) {
								//alert(li.attributes);
			$('content_menu_two').appendChild(li);
		}); 
		group_two.each(function(li) {
			$('content_menu_one').appendChild(li);
		}); 
	}
}