function ShowHide(id) {
      var obj = null;
      if (document.all) {
          if (document.all['tr['+id+']']) 
              obj = document.all['tr['+id+']'];
      }
      if (document.getElementById) {
          if (document.getElementById('tr['+id+']')) 
              obj = document.getElementById('tr['+id+']');
      }
      obj.style.display=(obj.style.display=='none')?'inline':'none';
  }