Remove this

<div id='fb-root'></div>
    <script src='http://connect.facebook.net/en_US/all.js'></script>
    <p><a onclick='addToPage(); return false;'>Post to Feed</a></p>
    <p id='msg'></p>
 
    <script>
      FB.init({appId: "YOUR_APP_ID", status: true, cookie: true});
 
      function addToPage() {
 
        // calling the API ...
        var obj = {
          method: 'pagetab',
          redirect_uri: 'YOUR_URL',
        };
 
        FB.ui(obj);
      }
   
    </script>