$(function(){

	var setImg = "#headBn";
	var fadeSpeed = 1500;
	var switchDelay = 5000;

	$(setImg).children("span").css({opacity:"0"});
	$(setImg + " span:first").stop().animate({opacity:"1",zIndex:"20"},fadeSpeed);

	setInterval(function(){
		$(setImg + " span:first-child").animate({opacity:"0"},fadeSpeed).next("span").animate({opacity:"1"},fadeSpeed).end().appendTo(setImg);
	},switchDelay);


});