Cute Introduction to Objects
(Sep 2003 - a 749 KB, 8-page PDF file)

How to think like a computer scientist
by Allen B. Downey, Sep 2002 (a 1.87 MB, 236-page PDF file)

The Java Language Specification
(HTML or 7.9 MB, 684-page PDF)
from Sun Microsystems Documentation

The Complete Idiot's Guide to JavaScript
by Aaron Weiss & Scott J. Walter

JavaScript 1.3 Reference
from Sun Microsystems Documentation