a problem with _self and a problem with browser

[Poul Kristensen]

Hi,   I'm a very very NOVICE to java.   I have mixed to examples from Steven Holzner's "Learning by examples".   And it works fine if I dont put the string "_self" in the URL method.   Reading www.javasoft.com this should work. Am I doing something completely foolish?   I want to keep the frame showing a new document.    And one more thing. Does anybody know why "some text" in method newpopupmenu does appear using netscape but won't appear using MS Explorer 4.0.?   TIA    Poul             import java.applet.Applet;         import java.awt.*;         import java.awt.event.*;         import java.net.*;          public class popupx extends Applet implements ActionListener, MouseListener {                 TextField text1;                 PopupMenu popup;                 MenuItem menuitem1, menuitem2, menuitem3;                                 public void init(){                          popup = new PopupMenu("some text");                         menuitem1 = new MenuItem("2000");                         menuitem1.addActionListener(this);                         menuitem2 = new MenuItem("1999");                         menuitem2.addActionListener(this);                         menuitem3 = new MenuItem("1998");                         menuitem3.addActionListener(this);                         popup.add(menuitem1);                         popup.add(menuitem2);                         popup.addSeparator();                         popup.add(menuitem3);                         add(popup);                         text1 = new TextField(30);                         add(text1);                         addMouseListener(this);                 }                  public void mousePressed(MouseEvent e){                         if(e.getModifiers() != 0){                                 popup.show(this, e.getX(), e.getY());                         }                 }                  public void mouseClicked(MouseEvent e){                 }                  public void mouseReleased(MouseEvent e){                 }                  public void mouseEntered(MouseEvent e){                 }                  public void mouseExited(MouseEvent e){                 }          public void actionPerformed(ActionEvent event){             if(event.getSource() == menuitem1){             URL newURL = null;                   {                          try { newURL = new URL("http://www.sfi.dk/pub/show2000.php3","_self");}                            catch (MalformedURLException e1 ) {}                             getAppletContext().showDocument(newURL);                   }                                               }             if(event.getSource() == menuitem2){             URL newURL = null;                   {                          try { newURL = new URL("http://www.sfi.dk/show1999.php3","_self");}                            catch (MalformedURLException e2 ) {}                             getAppletContext().showDocument(newURL);                   }                                               }             if(event.getSource() == menuitem3){             URL newURL = null;                   {                          try { newURL = new URL("http://www.sfi.dk/pub/show1998.php3","_self");}                            catch (MalformedURLException e2 ) {}                             getAppletContext().showDocument(newURL);                   }                                 }         }          }