Event.observe(window, 'load', function() {
	var itemHandler = function(event) {
		Event.stop(event);
		var item = this.up('.dropdown-item');
		if (item.hasClassName('g-opened')) {
			item.removeClassName('g-opened');
			return;
		}
		item.addClassName('g-opened');
		item = item.next('.g-opened') || item.previous('.g-opened');
		if (item) {
			item.removeClassName('g-opened');
		}
	};
	
	$$('.dropdown-box .dropdown-item-title').each(function(item) {
		Event.observe(item, 'click', itemHandler);
	});
});