function flipbook_showtab(li, index)
{
	li = $(li);
	var div = li.getParent('div.flipbook');
	var ul = li.getParent('ul');
	
	var lis = ul.getElements('li');
	lis.removeClass('selected');
	lis[index].addClass('selected');
	
	var imgs = div.getElements('img.flipbook-image'); 
	imgs.removeClass('selected');
	imgs[index].addClass('selected');
}