How to write html5 code for

how can i write a html5 prototype which must be able to communicate which the server and reply back to the client.this is the task that is i need开发者_StackOverflow to design a prototype which will be able to communicate with the server

http://www.indicthreads.com/1525/building-real-time-web-applications-using-html-5-web-sockets/