MyNav = {
	initNavTrough: function(){
		$('nav-products').observe('click', function(ev){ ev.stop(); swapSubnav('cat-list')});
	}

	swapSubnav: function(el){
		var visibles = new Array();
		$$('#subnav ul').each(function(e){
			if(el.style.display != "none"){ visibles.push(e) }
		});
		visibles.each(function(e){ e.style.display = "none" });
		$(el).style.display = "block";
	}
}

document.observe('dom:loaded', MyNav.initNavTrough);