var top_image = 0;
var reserve_image = 1;
var max_images = 0;

jQuery(function() {
  max_images = jQuery('.image_rotator img').length;
  setTimeout("rotate_image()", 5000);
  jQuery('.image_rotator .top_image');
})

function rotate_image() {
  jQuery('.image_rotator img.top_image').fadeOut(500, function() {
    top_image ++
    if (top_image >= max_images) {
      top_image = 0;
    }
    reserve_image ++
    if (reserve_image >= max_images) {
      reserve_image = 0;
    }
    jQuery('.image_rotator img').removeClass("top_image");
    jQuery('.image_rotator img').removeClass("reserve_image");
    jQuery('.image_rotator img:eq(' + top_image + ')').addClass("top_image");
    jQuery('.image_rotator img.top_image').show();
    jQuery('.image_rotator img:eq(' + reserve_image + ')').addClass("reserve_image");
    jQuery('.image_rotator img.reserve_image').show();
  });
  setTimeout("rotate_image()", 2000);
}