There are two sets of buttons and scrollbars to make it easy to see how colors look next to other colors. The scroll bars are for testing how colored scrollbars look - they do not do anything.
Source code is here.
This does not work on the Macintosh, which doesn't support changing of the color of standard buttons using java.
If you have any insights, workarounds or comments about this test page please contact Mickey Segal. A listing of many Java resources is at this link.