How to get user country,state,city of Facebook user

<script type="text/javascript">
                  window.fbAsyncInit = function() {
                    FB.init({
                      appId      : 'YOUR_APP_ID_HERE', // App ID
                      channelUrl : 'http://localhost.com/channel.html', // Channel File
                      status     : true, // check login status
                      cookie     : true, // enable cookies to allow the server to access the session
                      oauth      : true, // enable OAuth 2.0
                      xfbml      : true  // parse XFBML
                    });
                  };
                  (function(d){
                     var js, id = 'facebook-jssdk'; if (d.getElementById(id)) {return;}
                     js = d.createElement('script'); js.id = id; js.async = true;
                     js.src = "//connect.facebook.net/en_US/all.js";
                     d.getElementsByTagName('head')[0].appendChild(js);
                   }(document));
                </script>
                 
                <h1>Registration</h1>
                 
                <div style="float: left; margin-right: 15px;">
                     
                    <div class="fb-registration">
                        data-fields='[{"name":"name"},
                                        {"name":"birthday"},
                                        {"name":"location"}, //this retrieves the location of the user
                                        {"name":"gender"},
                                        {"name":"email"},
                                        {"name":"username","description":"Username","type":"text"},
                                        {"name":"password"}]' 
                        data-redirect-uri="http://localhost.com/register.php">
                     

</div></div>