I just finished a game with Lwjgl and I want to put it on my site like this: http://www.spel.nl/spel/tap-the-frog
How can I do that???
The shortest answer is you can’t.
The next shortest answer is you can port it to something that is aimed at web integration, unlike LWJGL.
Try LibGDX, if you want to do what probably most people here do.
Adding to the list, forum member SHC recently released an interesting webGL library ‘webgl4j’ that is designed to work similarly to lwjgl: