window.addEvent('domready', function() {

var imgNo = 1;
var current_img = "gallery_1";
var outin = 1;

var myTimedFunction = function (){

		if(outin==1){
      		var myFx = new Fx.Tween(current_img, {property: 'opacity'});
      		myFx.start(1,0).chain(
          //Notice that "this" refers to the calling object (in this case, the myFx object).
          function(){ 
      		
            		if(imgNo==1){
            		$(current_img).src = "images/banner3.jpg"; 
            		imgNo=3;
            		} else {
            		$(current_img).src = "images/banner1.jpg";
            		imgNo=1;
            		}
								
								outin=0;
      		
      		});
		} else {
					 $(current_img).fade('in');
					 outin=1;
		}

}		


myTimedFunction.periodical(8000);
		
});