OT: Java vs Javascript, and is it in Mozilla?

[Kent West <westk@acu.edu>]

Okay, so I'm showing my ignorance here.

What's the difference (in 2 sentences or less) between Java and 
Javascript (as indicated by the Mozilla preference fields for both)? I 
can't seem to turn on the "Enable Java" preference in M18 (even with a 
restart of Mozilla), although I can turn on "Enable JavaScript for 
Navigator".

A related question: I'm trying to run a web-enabled product via M18 on 
Woody that apparently requires Java. All I get is a blank page. Is this 
because I don't have Java installed? Does it install into my Woody 
system, and then Mozilla "sees" it, or does it install into Mozilla, or 
something else entirely. Is it not installed and that's why I can't turn 
on the "Enable Java" preference?

Thanks!