code: function()
                  {
                      var $toolbar = $('<div/>').addClass( 'wysiwyg-toolbar' ).addClass( toolbar_top ? 'wysiwyg-toolbar-top' : 'wysiwyg-toolbar-bottom' );
                      if( toolbar_focus )
                          $toolbar.hide().addClass( 'wysiwyg-toolbar-focus' );
                      // Add buttons to the toolbar
                      add_buttons_to_toolbar( $toolbar, false,
                          function() {
                              // Open a popup from the toolbar
                              var $popup = $(wysiwygeditor.openPopup());
                              // if wrong popup -> create a new one
                              if( $popup.hasClass('wysiwyg-popup') && $popup.hasClass('wysiwyg-popuphover') )
                                  $popup = $(wysiwygeditor.closePopup().openPopup());
                              if( ! $popup.hasClass('wysiwyg-popup') )
                                  // add classes + content
                                  $popup.addClass( 'wysiwyg-popup' );
                              return $popup;
                          },
                          function( $popup, target, overwrite_offset ) {
                              // Popup position
                              var $button = $(target);
                              var popup_width = $popup.outerWidth();
                              // Point is the top/bottom-center of the button
                              var left = $button.offset().left - $container.offset().left + parseInt($button.width() / 2) - parseInt(popup_width / 2);
                              var top = $button.offset().top - $container.offset().top;
                              if( toolbar_top )
                                  top += $button.outerHeight();
                              else
                                  top -= $popup.outerHeight();
                              if( overwrite_offset )
                              {
                                  left = overwrite_offset.left;
                                  top = overwrite_offset.top;
                              }
                              popup_position( $popup, $container, left, top );
                          });
                      if( toolbar_top )
                          $container.prepend( $toolbar );
                      else
                          $container.append( $toolbar );
                  }
docs: Callback to create toolbar on demand