var MAT = {
	showDetail: function(nugget) {
		var showdiv = 'material-' + nugget + '-detail';
		var currentLi = 'material-' + nugget + '-link';
		$$('.materials div.detail').each(function(d) {
			d.addClass('hidden');
		});
		$$('.materials .list .current')[0].removeClass('current');
		$(showdiv).removeClass('hidden');
		$(currentLi).addClass('current');
	},
	
	showSummary: function(nugget) {
		var showSum = 'material-' + nugget + '-summary';
		$(showSum).removeClass('hidden');
	},
	
	hideSummary: function(nugget) {
		var showSum = 'material-' + nugget + '-summary';
		$(showSum).addClass('hidden');
	}
};