title: Form submission via ajax rails 2 to rails 3
body: <p>I am upgrading my ruby on rails application from rails <code>2.3.14</code> to rails <code>3.2.6</code>. In my ajax form submission, i am getting following errors.</p>
  
  <pre><code>WARNING: Can't verify CSRF token authenticity
  Completed 500 Internal Server Error in 9ms
  </code></pre>
  
  <p>Any suggestions?</p>