Java applet and popups

[meghatronic]

How come on Safari, I get a close/minimise button on popup? I also get something like "applet window" on IE.

I don't remember seeing these before.... and sure I haven't changed anything.

popup = new JPopupMenu();
        nodemenuItem = new JMenuItem("Jump to node page");
        nodemenuItem.addActionListener(this);
        popup.add(nodemenuItem);
        aboutmenuItem = new JMenuItem("About applet");
        aboutmenuItem.addActionListener(this);
        popup.add(aboutmenuItem);