How to exit my application, not my facebook account?

I am using facebook javascript sdk in my web application.

I use the api chart to enter my application

When I left my application,

my application is logging off and my facebook account is also logging off.

How to exit my application, not my facebook account?

Please help me if someone found a solution for this.

this is my code -

<script type="text/javascript">     

        var button;
        var userInfo;

        window.fbAsyncInit = function() {
            FB.init({ appId: '########', 
                status: true, 
                cookie: true,
                xfbml: true,
                oauth: true});

           showLoader(true);

           function updateButton(response) {
                button       =   document.getElementById('fb-auth');
                userInfo     =   document.getElementById('user-info');
                userdata =   document.getElementById('user-data');
                if (response.authResponse) {
                    //user is already logged in and connected
                    FB.api('/me', function(info) {
                        login(response, info);
                    });

                    button.onclick = function() {
                        FB.logout(function(response) {
                            logout(response);
                        });
                    };
                } else {
                    //user is not connected to your app or logged out
                    button.innerHTML = 'Login';
                    button.onclick = function() {
                        showLoader(true);
                        FB.login(function(response) {
                            if (response.authResponse) {
                                FB.api('/me', function(info) {
                                    login(response, info);
                                });    
                            } else {
                                //user cancelled login or did not grant authorization
                                showLoader(false);
                            }
                        },                                 {scope:'email,user_birthday,status_update,publish_stream,user_about_me'});   
                    }
                }
            }

            // run once with current status and whenever the status changes
            FB.getLoginStatus(updateButton);
            FB.Event.subscribe('auth.statusChange', updateButton);  
        };
        (function() {
            var e = document.createElement('script'); e.async = true;
            e.src = document.location.protocol 
                + '//connect.facebook.net/en_US/all.js';
            document.getElementById('fb-root').appendChild(e);
        }());


        function login(response, info){
            if (response.authResponse) {
                var accessToken                                 =   response.authResponse.accessToken;

                userInfo.innerHTML                             = '<img src="https://graph.facebook.com/' + info.id + '/picture">' + info.name
                                                                 + "<br /> Your Access Token: " + accessToken;


        button.innerHTML                               = 'Logout';
                showLoader(false);
                document.getElementById('other').style.display = "block";

            }
        }

        function logout(response){
            userInfo.innerHTML                             =   "";
            document.getElementById('debug').innerHTML     =   "";
            document.getElementById('other').style.display =   "none";
            showLoader(false);
        }

        //stream publish method
        function streamPublish(name, description, hrefTitle, hrefLink, userPrompt){
            showLoader(true);
            FB.ui(
            {
                method: 'stream.publish',
                message: '',
                attachment: {
                    name: name,
                    caption: '',
                    description: (description),
                    href: hrefLink
                },
                action_links: [
                    { text: hrefTitle, href: hrefLink }
                ],
                user_prompt_message: userPrompt
            },
            function(response) {
                showLoader(false);
            });

        }
        function showStream(){
            FB.api('/me', function(response) {
                //console.log(response.id);
                streamPublish();
            });
        }           

  function share(){
            showLoader(true);
            var share = {
                method: 'stream.share',
                u: 'http://www.appovative.com/'
            };

            FB.ui(share, function(response) { 
                showLoader(false);
                console.log(response); 
            });
        }



        function setStatus(){
            showLoader(true);

            status1 = document.getElementById('status').value;
            FB.api(
              {
                method: 'status.set',
                status: status1
              },
              function(response) {
                if (response == 0){
                    alert('Your facebook status not updated. Give Status Update   Permission.');
                }
                else{
                    alert('Your facebook status updated');
                }
                showLoader(false);
              }
            );
        }

        function showLoader(status){
            if (status)
                document.getElementById('loader').style.display = 'block';
            else
                document.getElementById('loader').style.display = 'none';
        }

    </script>