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:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<html>
<head>
<title>Facebook app test</title>
<script type="text/javascript" src="https://code.jquery.com/jquery-latest.min.js"></script>
<script src="https://connect.facebook.net/en_US/all.js"></script>
<script type="text/javascript">
FB.init({
appId : '1420154948223014',
status : true,
cookie : true,
xfbml : true
});
</script>
<script type="text/javascript" src="script.js"></script>
</head>
<body>
<div id="fb-root"></div>
<div class="fb-like" data-href="http://www.facebook.com/cocacola" data-layout="standard" data-action="like" data-show-faces="false" data-share="false"></div>
</body>
</html>
When the "Like" button clicked things are like in the screenshot http://postimg.org/image/hulovrz5v/.
When I click on the "Error" a pop-up opens with following message:
Message Failed: This message contains content that has been blocked by our security systems.