Buttons can make noises in response to your mouse movements.
Buttons can change colors and be moved around.
Click on buttons to open web pages, communicate with other applets, or with the Java 1.1 version, you can display menus. You can feed any static image you wish, even transparent GIFs. You can adjust opacities, colors, and the fonts of labels and menus. Demonstration The Java 1.0.2 version should be supported by all the Java-enabled browsers. As far as I know for the Windows platform, Java 1.1 is supported by Netscape Navigator 4.06 and Internet Explorer 4.0 and higher versions.