automatic thumbnail slider using jquery : cannot add animation effects

here is my code function rotate_images() { var i=1;

var _rotate = function() {

setTimeout(function() {

var li=$('#li'+i); $('#li'+i).animate({'display':'none'},1000,'swing',function(){$(this).remove();});

 if(i<5)
 {
  i++;
 _rotate();           
 }
 else
 {
  i=1;
  _rotate();
 }
 },2000);     

}; _rotate(); }

I highly recommend the jquery cycle plugin to accomplish this:

http://jquery.malsup.com/cycle/

Just tell it the parent object and you can customize how it works and use easing effects etc..