$(function() {
  $('#montage').cycle({ fx: 'fade', speed: 3000 });
  image_viewer();
});

function image_viewer() {
  var images = $('#listing-picture img.image');
  var thumbnails = $('#listing-picture img.thumbnail');
  
  images.hide();
  images.eq(0).show();
  thumbnails.click(function() {
    var index = thumbnails.index(this);
    images.hide();
    images.eq(index).show();
  });
}