I'm trying to learn Joomla 1.0 to support some legacy sites my company hosts. I setup a sample site for my personal use. The thing I'm confused on now is that I setup a main menu and several side menus. The intention is that you click a primary nav, see that landing page with the primary nav in an 'on' state and now you have a sub menu. But, when you click on the sub pages, those navs turn on, but the primary nav is off. How do I tell Joomla to keep that primary nav in an 'on' state?