Perl is not in itself a windowing client but it can
drive libraries which display windows, as with Tk.
In the web context, if you use Javascript to create
images in Netscape which automatically highlight on
mouseover, Perl can
modify that file on the fly to specify which images
should be drawn. You would modify a template
containing the Javascript on the fly.
If a gorgeous interface is the most important thing
to you, Java or a DHTML interface with Javascript is
the answer to the front end. Java or Perl can be used
on the back end. Personally I find Swing too heavy
and you can probably get everything you need for a web
app through DHTML.
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