Have you read WWW::Selenium? Especially the first paragraph of the "DESCRIPTION" section, which happens to be the first paragraph of prose in the documentation? Also, the last sentence of that section could help you understand more. I'm quoting both here:

Selenium Remote Control (SRC) is a test tool that allows you to write automated web application UI tests in any programming language against any HTTP website using any mainstream JavaScript-enabled browser. SRC provides a Selenium Server, which can automatically start/stop/control any supported browser. It works by using Selenium Core, a pure-HTML+JS library that performs automated tasks in JavaScript; the Selenium Server communicates directly with the browser using AJAX (XmlHttpRequest).

http://www.openqa.org/selenium-rc/

...

To use this module, you need to have already downloaded and started the Selenium Server. (The Selenium Server is a Java application.)

In reply to Re^5: how to browse a dynamic site using mechanize? by Corion
in thread how to browse a dynamic site using mechanize? by jack123

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