// display or hide "quick look" elements

   function preview(id,linked)
   {
      var dest = document.getElementById('quicklook');
      if (id == 0)
      {
         // hide zone
         dest.style.display = 'none';
         dest.innerHTML = ' ';
      }
      else
      {
         // display zone
         source = document.getElementById(id);
         var newHTML = "<h5>Quick Look</h5><p>" + source.innerHTML + "</p>";
         if (linked) newHTML += "<p><b>Click for full information</b></p>";
         dest.innerHTML = newHTML;
         dest.style.display = 'block';
      }
   }