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)
  {
    if (!browserCheck)  return;  
      document.lastToggledImageSource = document.images[_imgName].src;
      document.images[_imgName].src  = document.imgRefArray[_imgName].src;
	  
	  document.imgRefArray[_imgName].src = document.lastToggledImageSource;

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