(function(){
	var id;
	$$('.group-files').each(Element.hide);
	$$('.group-list a').each(function(l){
		id=/\blink-(\d+)\b/.exec(l.className);
		var group=$('group-'+id[1]), list=l.up('.group-list');
		l.observe('click', function(){
			list.hide();
			group.show();
		});
		group.down('.link-back').observe('click', function() {
			group.hide();
			list.show();
		});
	});	
})();