gistfile1.js

    $('#delete-token').click(function() {
      $this = $(this);
      $.ajax({
        type: "post",
        url: "/groups/4/account/delete_token",
        success: function(data) {
          $("#direct_join").fadeOut(150, function() {
            $(this).html('');
          });
        $this.fadeOut(150);
        }
      });
    });