static JPanel jTiledBackground(S imageID, Component contents) {
  final BufferedImage tileImage = loadImage2(imageID);
  ret new JPanel {
    protected void paintComponent(Graphics g) {  
      int width = getWidth();  
      int height = getHeight();  
      for (int x = 0; x < width; x += tileImage.getWidth())  
        for (int y = 0; y < height; y += tileImage.getHeight())
          g.drawImage(tileImage, x, y, this);  
    }
  };
}
  
static JPanel jTiledBackground(S imageID, Component contents) {
  JPanel panel = jTiledBackground(imageID);
  panel.setLayout(new BorderLayout);
  panel.add(BorderLayout.CENTER, jtransparent_recursive(contents));
  ret panel;
}