title: Issue with site and wave.webaim.org
body: <p>Hello I am sorry but I am a newbie. And i would like to help me out please to understand. I created a accessibility joomla site and have k2store. Everything works fine but when I add a product in the cart nothing happens(neither the pop up message nor the page). Instead i get a message: XMLHttpRequest cannot load url/index.php. Response to preflight request doesn't pass access control check: No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin '<a href="http://wave.webaim.org" rel="nofollow">http://wave.webaim.org</a>' is therefore not allowed access. The response had HTTP status code 406.
  But this happens only in the validators. Live it works fine. Please help </p>