There are many options for working with pages containing Javascript:

• Need to pull a javascript generated webpage
• Difficulties with WWW::Mechanize ->click_button() difficulties
• How to make Perl modify and trigger Javascript variable/function
• WWW::Mechanize / javascript pointer
• JavaScript Plugin in www::Mechanize
• How do I perform web automation with sites that use Javascript?
• SpiderMonkey and JS
• The age old JavaScript WWW::Mech scenario
• Using WWW::Selenium To Test Or Automate An Ajax Website
• mechanize and javascript
• How to handle javascript
• Re: Handling Javascript with LWP::UserAgent
• web mechanize issue with javascript...
• Javascript and other evil goodies
• ...
• WWW::Mechanize::Firefox
• WWW::Selenium