Java and JavaScript

Hi all,
I'm trying to communicate between my JApplet and the JavaScript in my HTML. I know vaguely that I have to
use netscape.javascript.JSObject to do so,but I have no idea where to find JSObject or java_30.zip etc. Also,is this the only way to
talk between Java and JavaScript? All this is very confusing.
What is the MAYSCRIPT tag and where do we need to use this tag?

Thanks in advance!
Have a nice day!!!