window.addEvent('domready',function(){
	$$('a.next_new_model').each(function(el){
		el.addEvent('click',function(e){
			e.stop();
			var top_model = getTopModel(el);
			var new_model = top_model.getNext('div');
			if(!new_model) new_model = top_model.getParent('div').getFirst('div');
			top_model.addClass('dn');
			new_model.removeClass('dn');
		});
	});
	$$('a.prev_new_model').each(function(el){
		el.addEvent('click',function(e){
			e.stop();
			var top_model = getTopModel(el);
			var new_model = top_model.getPrevious('div');
			if(!new_model) new_model = top_model.getParent('div').getLast('div');
			top_model.addClass('dn');
			new_model.removeClass('dn');
		});
	});
});

function getTopModel(obj){
	return obj.getParent('div').getParent('div');
}