First of all to scrape javascript kind of site, you can't do it using WWW::Mechanise, use WWW::Mechanize or WWW::Scripter.

Secondly, the link which you've given , that site is created in ASP and believe me it's tough to crawl ASP site, since they use many other different method like EVENTMETHOD, EVENTVALIDATION.............you can do one thing, try to find out links in console and from that you can crawl it. That link will be something like this:
http://support.dell.com/support/public/menu.aspx?c=us&l=en&s=dhs&cs=19