document.imgRefArray = new Array()

// -----------------------------------------------------------------  
  function browserCheck()
  {
	return (document.images);
  }
// -----------------------------------------------------------------  
  function registerToggleImage(_imgRefName,_imgSrc)
  {
    if (!browserCheck)  return;  
    document.imgRefArray[_imgRefName] = new Image()  ; 
    document.imgRefArray[_imgRefName].src = _imgSrc;
  }
// -----------------------------------------------------------------  

  function toggle(_imgName,_state)
  {
    if (!browserCheck)  return;  
    if (_state == 0)
    {
      if (document.lastToggledImage != null)
        document.lastToggledImage.src = document.lastToggledImageSource;
      document.lastToggledImage = null;
      document.lastToggledImageSource = '';
    }
    if (_state == 1)
    {
      if (document.lastToggledImage != null)
        document.lastToggledImage.src = document.lastToggledImageSource;
      document.lastToggledImage = document.images[_imgName];
      document.lastToggledImageSource = document.images[_imgName].src;
      document.images[_imgName].src  = document.imgRefArray[_imgName].src;
    }

  }
// -----------------------------------------------------------------