title: How do you remove the throbber from drupal 7 Ajax link?
body: <p>we are using drupal 7 ajax framework to load content on a page. When the link is clicked a throbber  shows up after the link while the request is processed. </p>
  
  <p>I can't find documentation on how to set or remove the throbber. In a form it looks really simple, but using an ajax link and a callback menu item I can't find any documentation. </p>
  
  <p>I see that there is a $settings variable that can be passed to the ajax_command_html function, but I don't see any docs as to how it should be formatted. </p>