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Timeline Action Layout - No Attachment displayed
FB.api('/me/application:action_type' + '?opject_type='+document.location.href,'post',
      function(response) {
          if (!response || response.error) {
              alert("error");
          } else {
              alert("success");
          }
      });

<html xmlns="http://www.w3.org/1999/xhtml" xmlns:fb="http://ogp.me/ns/fb#">
<head prefix="og: http://ogp.me/ns# fb: http://ogp.me/ns/fb# app: http://ogp.me/ns/fb/app#">

<meta property="fb:app_id" content="123" />
<meta property="og:type" content="app:action" />
<meta property="og:url" content="http://www.example.com/" />
<meta property="og:url" content="http://www.example.com/" />
<meta property="og:title" content="Testing Title" />
<meta property="og:description" content="testing Description" />
<meta property="og:image" content="http.example.com/image.jpg" />