no@nospam.com wrote:
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Can anyone recommend a site or two that shows of a variety of things that
javascript is capable of? Can it write to the local drive, make network
connections? What about the kinds of controls it can use, does javascript
have a slide control? Progress meter? Are rhere any graphics packages?
Thanks.
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Client-side Javascript is somewhat limited for security reasons, not for
technical reasons. Because of this, it cannot write to the local drive,
or make a network connection.
Let me back up. Javascript is a language, independant of the browser,
and independant of any graphics capabilities or OS. This is the case
with most languages. Javascript is also a different programming
language than Java. In the browser, Javascript is integrated, and the
browser's internal DOM (Document Object Model) is exported to
Javascript. Anything the broswer gives to Javascript or the host in
general (hosts can be any application. I think Adobe allows the use of
Javascript) gives to Javascript is availble to the user.
For security reasons, the browser does not allow writing to the local
drive, or making network connections.
As for controls, There are definately libraries that have been developed
for slide controls and progress meters. I have even seen a minimal
graphics package (draw graphs, boxes and lines), but these are pretty
convoluted, since the browser does not export any easy means for doing so.
Javascript can also be used on the server side, using the Netscape
server, where you have an entire different set of tools exported to
Javascript for you to use. That method may have more graphics library
capabilities. I know that PHP has some on-the-fly graphics capabilities
that are really nice. Server-side javascript _might_ have something
similar?
Brian
