function Object1(obj) {
  var tmp;
  if (document.images[obj].src.indexOf('_up') == -1) {
          tmp = document.images[obj].src.replace('_down', '_up');
          document.getElementById('box_' + obj).style.display = 'none';
          document.images[obj].src = tmp;
            }
  else {
          tmp = document.images[obj].src.replace('_up', '_down');
          document.getElementById('box_' + obj).style.display = 'block';
          document.images[obj].src = tmp;
          }
  }