title: Facebook Like button error: Message Failed: This message contains content that has been blocked by our security systems
body: <p>I'm developing an JavaScript application. A portion of it contains logic, where I should determine if user liked a certain Facebook page. For that I have inserted the Facebook like button into the HTML page. Here is the HTML source:</p>
  
  <pre><code>    &lt;!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd"&gt; 
      &lt;html&gt;
  
          &lt;head&gt;
              &lt;title&gt;Facebook app test&lt;/title&gt;
              &lt;script type="text/javascript" src="https://code.jquery.com/jquery-latest.min.js"&gt;&lt;/script&gt;
              &lt;script src="https://connect.facebook.net/en_US/all.js"&gt;&lt;/script&gt;
              &lt;script type="text/javascript"&gt;
                  FB.init({
                      appId  : '1420154948223014',
                      status : true, 
                      cookie : true, 
                      xfbml  : true  
                  });
              &lt;/script&gt;
              &lt;script type="text/javascript" src="script.js"&gt;&lt;/script&gt;
  
          &lt;/head&gt;
  
          &lt;body&gt;
              &lt;div id="fb-root"&gt;&lt;/div&gt;
              &lt;div class="fb-like" data-href="http://www.facebook.com/cocacola" data-layout="standard" data-action="like" data-show-faces="false" data-share="false"&gt;&lt;/div&gt;
  
          &lt;/body&gt;
  
      &lt;/html&gt;
  </code></pre>
  
  <p>When the "Like" button clicked things are like in the screenshot <a href="http://postimg.org/image/hulovrz5v/">http://postimg.org/image/hulovrz5v/</a>.</p>
  
  <p>When I click on the "Error" a pop-up opens with following message:
  <code>Message Failed: This message contains content that has been blocked by our security systems.</code></p>