fbpost.js

(function(d, s, id){
         var js, fjs = d.getElementsByTagName(s)[0];
         if (d.getElementById(id)) {return;}
         js = d.createElement(s); js.id = id;
         js.src = "https://connect.facebook.net/en_US/sdk.js";
         fjs.parentNode.insertBefore(js, fjs);
       }(document, 'script', 'facebook-jssdk'));
      window.fbAsyncInit = function() {
        FB.init({
          appId      : 'app_id',
          xfbml      : true,
          cookie     : true,
          status     : true,
          version    : 'v2.5'
        });
        FB.Event.subscribe("xfbml.render", changeSettings)
        
      };

      var changeSettings = function(token) {
        console.log("aa");
          yourToken = token;
          FB.api('/app_id', 'POST', {
              "access_token": "app_id|app_secret",
              "canvas_url": "https://apps.facebook.com/ognjen",
              "secure_canvas_url": "https://ognjen.com/canvas/ognjen/"
            },
            function (response) {
                console.log("bb");
                 console.log(response);
              }
          );
      }