docs: function() {
          var hist = $.mobile.navigate.history;
  
          if ( this._isCloseable ) {
              this._isCloseable = false;
              // If the hash listening is enabled and there is at least one preceding history
              // entry it's ok to go back. Initial pages with the dialog hash state are an example
              // where the stack check is necessary
              if ( $.mobile.hashListeningEnabled && hist.activeIndex > 0 ) {
                  $.mobile.back();
              } else {
                  $.mobile.pageContainer.pagecontainer( "back" );
              }
          }
      }