I need to send a instant message from one computer to another through the internet. For example. Computer A (the sender) and Computer B (the reciever). 'A' will be at a webpage with textfields and a "Send" button, 'B' will be waiting(listening) at another specific webpage. 'A' will enter stuff into the textfield and click the Send button and 'B' will recieve it ( via a popup/dialog? applet? ).
This is basically a one way messaging, 'B' does not need to have any means of reply. Is this possible with JSP? If so, what is the simplest way in implementing this, authentication aside.