final JDesktopPane desktopPane = jmeDesktop.getJDesktop();
// desktopPane.removeAll();
final JInternalFrame internalFrame = new TransparentInternalFrame();
final ChatPanel pan = new ChatPanel();
pan.validate();
internalFrame.add(pan);
internalFrame.setVisible(true);
internalFrame.setSize(new java.awt.Dimension(320, 250));
internalFrame.pack();
internalFrame.setLocation(0,desktopPane.getHeight()-internalFrame.getHeight());