$(function() {
  $("#next-image2").click(function () { 
    slideFade();
  });
});

function slideFade() {
  var $active = $("#next-image2 img.active");
  if ($active.length == 0) $active = $("#next-image img:last");
  var $next =  $active.next().length ? $active.next() : $("#next-image2 img:first");

  $next.addClass("active");
  $active.removeClass("active");
}