JS to detect if the user has been to certain URLs.

gistfile1.haml

%div#whereyoubeen{:style => "display:none"}
  %a{:href => "http://www.google.com/"} Google
  %a{:href => "http://www.amazon.com/"} Amazon
  %a{:href => "http://www.yahoo.com/"} Yahoo
  %a{:href => "http://www.neimanmarcus.com/"} Neiman Marcus
  %a{:href => "http://www.strings.com/"} Strings
  %a{:href => "http://www.huffingtonpost.com/"} Huffington Post
:javascript
  alert("You have been to: " + $$('#whereyoubeen a:visited').map(function(link) {return link.innerHTML;}).join(','));