(function($) {
	$.fn.rotate = function(interval) {
        var inter = (typeof interval == 'undefined') ? 5000 : interval;
		var container = $(this);
		var totale = container.find("div.ba").size();
		var current = 1;
		var i = setInterval(function() {
			if (current >= totale) current = 0;
			container.find("div.ba").filter(":eq("+current+")").fadeIn("slow").end().not(":eq("+current+")").hide();
			current++;
		}, inter);
		return container;
	};
})(jQuery);