anchor.diff:        cookie     : true,
         xfbml      : true  // parse XFBML
       });
  -
       // authorization
       FB.Event.subscribe('auth.authResponseChange', function(response){
        if (response.status === 'connected'){
  
positive.code:         message: 'a custom message',
          description:'this is a test message'
      });}
  
  </script>
  <div id='page'>
  <div align="center">
  <h2 id='title'>facebook</h2>
  
  <div id="status">
    <button onclick="Login()">log in</button>
    <br>
  </div>
  
  <script>
  function myFacebookLogin() {
  
negative.code:           str +="<input type='button' value='Logout' onclick='Logout();'/>";
            document.getElementById("status").innerHTML=str;
      });}
      function getPhoto(){
        FB.api('/me/picture?type=normal', function(response) {
            var str="<br/><b></b> <img src='"+response.data.url+"'/>";
            document.getElementById("status").innerHTML+=str;
      });}
      function Logout(){
          FB.logout(function(){document.location.reload();});
      }
    // Load the SDK asynchronously
    (function(d){
       var js, id = 'facebook-jssdk', ref = d.getElementsByTagName('script')[0];
  