Javascript: jQuery pubsub

gistfile1

(function($) {
	var o = $( {} );

	$.each({
		on: 'subscribe',
		trigger: 'publish',
		off: 'unsubscribe'
	}, function( key, api ) {
		$[api] = function() {
			o[key].apply( o, arguments );
		}
	});
})(jQuery);