final Container pane = getContentPane();
driveletter = JOptionPane.showInputDialog(null , "ENTER THE DRIVE LETTER (ENGLISH) OF THE CD OR DVD YOU ARE USING ");
    driveletter = driveletter.toUpperCase();
    try {
      webBrowser = new WebBrowser(new URL("file:///" + driveletter + ":\\introduction.htm" ));
    
 
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  browserpane = new JScrollPane(webBrowser);
 
      // browserpane.createHorizontalScrollBar();
    //  browserpane.createVerticalScrollBar();
      browserpane.setBounds(new Rectangle(200,80,610,460)); //(x,y,width,height)      
      pane.add(browserpane);     
      setVisible(true);
    }
    catch (MalformedURLException e) {
      System.out.println("first use of browser before any chapter sellection " + e.getMessage());
    }