JavaScript
About JavaScript
JavaScript is a scripting language, invented by NetScape. It was originally
named LiveScript. After the introduction of the Java
programming language by Sun Microsystems, NetScape changed its name to
JavaScript. Despite the confusing name similarity, JavaScript
has nothing to do with Java whatsoever.
Java is a full, standalone programming language that needs a compiler.
Java programs can run on any hardware platform (that supports the Java
environment). Often Java applets, small programs with limited
functionality, are included on a web page. These applets need to be downloaded
separately, much like images on a page.
JavaScript on the other hand, is a scripting language. It needs
an interpreter, not a compiler. Javascript "programs" are often included
within the source of a web page.
More and more pages on the World Wide Web use JavaScript. Often it is used
to create dynamic effects on pages, or to add complex functionality to
data-entry forms.
Although JavaScript has a basic protection scheme against privacy violation,
many people think this scheme isn't watertight.
Enabling JavaScript
You can configure AWeb to
use JavaScript or to ignore it. If you are concerned about your privacy,
you should disable JavaScript usage. Note that many pages will not look or
work the way they were designed if you disable JavaScript usage.
Breaking JavaScript programs
You might want to break a JavaScript program if it seems to run too long.
The Control / Break JavaScript menu item allows you
to do so. It will also cancel all outstanding timeout events, these are
often used to create a running text on a page.
Programmers
If you like to add JavaScript to your own pages, AWeb offers you two
bonus features. There is a standalone
JavaScript interpreter, and there is the unique
debugger.
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