2. contents
I. what is Javascript?
II. where did it come from?
III. what does it all mean?
IV. what does Javascript do?
V. want to get some?
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3. what is Javascript?
JavaScript ≠ Java
Java is complex; requires declarations,
compiling, and servers
JavaScript is unrelated to Java, except that:
both use C syntax
JavaScript uses many Java names and naming
conventions
JavaScript looks like Java, but is easier for less
technical users to program
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4. where did it come from?
designed by Brendan Eich
Silicon Graphics, Netscape
now CTO of Mozilla (spin off from AOL/Netscape)
originally called Mocha, then LiveScript
built for Netscape browser
partnership between Sun Microsystems and
Netscape (Java runtime environment)
trademark of Sun, used under license
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5. what does it all mean?
capabilities
scripting language
easy to use and learn
runtime, not compiled
primarily client side, but also server side
snippets
interacts with HTML and DOM
browser control
form validation, formatting
rollover’s, etc.
adds client side application support
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6. what does it all mean?
related languages
ECMAScript
standardized version of JavaScript
Jscript
Microsoft version of JavaScript
VBScript
only works with Microsoft products
DHTML
combination of CSS and Javascript
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