Web Chatting Application in Java Applet

Is it possible to create a web-chatting application using java Applet ??

As far as I know, using Java Applet we cannot access Web Server due to S开发者_Go百科andbox restriction. But I'm not very sure about this ..

A sand-boxed applet can 'phone home' to its own server with no problems. It is only accessing other servers that requires trust.

as far as I remember we can access server from which we downloaded this applet without problems. Another opportunity is to try to sign the code to make it trusted.