import java.awt.*;
  import java.applet.*;
  import Tabbed;
  
  // subclass tabbed for callback
  class Tb extends Tabbed
  {       
    Tb(int x, int y, int w, int h)
    {
        super(x,y,w,h);
    }
    
    // simple callback: after first panel we must choose only second 
    void callback(Panel new_selection,Panel prev_selection)
    {
       Panel p[]=getPanels();
        if (prev_selection==p[0] && new_selection !=p[1])
          selectPanel(p[1]);
    }
    
  }

  public class TabTest extends Applet
  {
    
    Tb tabs;
	Panel panel1,panel2,panel3,panel4,panel5;
   
   public void init()
   {
    setLayout(null);
    setSize(400,400);
    setBackground(Color.lightGray);

    // create tabbed panel
    tabs = new Tb(30,30,350,300);
    
    // create subpanels
    panel1=new Panel();
    
    panel2=new Panel();
    panel2.setBackground(Color.green);
    
    panel3=new Panel();
    panel4=new Panel();
    panel5=new Panel();

    tabs.addPanel(panel1,"Panel N 1");
    tabs.addPanel(panel2,"Second panel");
    tabs.addPanel(panel3,"Panel N 3");
    tabs.addPanel(panel4,"Panel N 4");
    tabs.addPanel(panel5,"Panel N 5");     
    
    // disable one subpanel
    panel3.setEnabled(false);
    
    add(tabs);
    
    tabs.setForeground(Color.black);
    
    show();
   } 
  }