if (document.all) 
  {
    // Explorer (4.x)
    layerRef='document.all'
    styleRef='.style.'
  }
  else if (document.layers) 
  {
    // Netscape (4.x)
   layerRef='document.layers'
   styleRef='.'
  } 
  function show(divid)
  {
    eval(layerRef + '["' + divid + '"]' + styleRef + 'position="absolute"');
    eval(layerRef + '["' + divid + '"]' + styleRef + 'visibility="visible"');
  }
  function hide(divid)
  {
    eval(layerRef + '["' + divid + '"]' + styleRef + 'position="absolute"');
    eval(layerRef + '["' + divid + '"]' + styleRef + 'visibility="hidden"');
  }
  function flip(divid)
  {
    var state=eval(layerRef + '["' + divid + '"]' + styleRef + 'visibility');
    if(state.substring(0,1) == "h")
    {
      show(divid);
    }
    else
    {
      hide(divid);
    }
  }