var blank = new Image;
blank.src = '/img/gallery/loading.gif';

function getObj(obj) {
  return document.getElementById(obj);
}

function showFrame(img) {
  var photo = getObj('photoframe');
  photo.src = blank.src;
  photo.src = '';
  photo.src = '/img/gallery/tractor-' + (img) + '.jpg';
}

function hideFrame () {

}