in reply to Webpage Element Information

The name of what you are trying to capture is DOM (Document Object Model). You can access it in Perl via one of the HTML parsers, e.g. HTML::TreeBuilder. You can access it natively in JavaScript. So either grab the file and parse it with Perl or use JavaScript to send the DOM tree as a JSON string to a Perl script and use one of the CPAN JSON modules to turn it into a Perl data structure.