// conveniently, wikipedia includes jQuery

function visit(slug) {
  // avoid infinite loops!
  if (history.indexOf(slug) != -1) return; 

  // remember this page
  history.push(slug);

  jQuery.ajax("http://en.wikipedia.org/wiki/"+slug, {
    success:             // callback
      function(reply) {
        // do some processing to try to skip to the content
        reply = reply.substring(reply.indexOf("toctitle"));
        reply = reply.substring(reply.indexOf("</div>"));
        reply = reply.substring(reply.indexOf("<h2>"));
        reply = reply.substring(reply.indexOf("<p>"));

        // get the first link to not a file
	reply = reply.match(/href=['"]\/wiki\/(?!File:)([^'"]*)['"]/)[1];

        console.log(reply);
	visit(reply);
      }
  });
}

var history;

function startAt(initialSlug) {
  history = [];
  visit(initialSlug);
}

startAt("Cheese");