title: How to delete a cookie using jQuery?
body: <p>I want to use jQuery to delete cookies; I have tried this:</p>
  <pre><code>$.cookie('name', '', { expires: -1 });
  </code></pre>
  <p>But when I refresh the page, the cookie is still there:</p>
  <pre><code>alert('name:' +$.cookie('name'));
  </code></pre>
  <p>Why?</p>