Secure private message system allows two users to chat in secrecy. It lets you hold real-time conversations on a web page.
Users log in, and then can type what they'd like to say into a text box, and click a button.
The chat window refreshes itself every 10 seconds or so, so that others looking at the page will be able to see the new addition to the conversation. This should be compatible with all browsers. Users see a little photo of other users while chat. Users can send private messages. Users can change their color at any time.