Thanks for your quickly reply.
I copied many codes from the CarApplet demo, I dnt know which renderer.

buffer = new FrameBuffer(width, height, FrameBuffer.SAMPLINGMODE_NORMAL);
buffer.disableRenderer(IRenderer.RENDERER_SOFTWARE);


does it mean it is not software renderer?

And when the users access my applet, a lwjgl.dll will be transferred to the clients.

Now I am working on a horse racing game using JPCT. Everything goes well. But if I want to add some actions like 'Start','End','Exit' etc to the 3D world,  and the same problem is that I want add start list and finish result boards to it, how should I do?

By the way, how can these menus or buttons be called by mouse event?

Thx