function preloadImages()
{ if (document.images) 
  { var imgFiles     = preloadImages.arguments;
    var preloadArray = new Array();
    
    for (var i = 0; i < imgFiles.length; i++) 
    { preloadArray[i]     = new Image;
      preloadArray[i].src = imgFiles[i];
    }
  }
}

function swapImage() 
{ var obj = eval(swapImage.arguments[0]);
    
  if (obj != null) 
  { if (obj.src != swapImage.arguments[1])
    { obj.src = swapImage.arguments[1];
    }
  }
}