code: function() {
          var activated = false;
          if(OpenLayers.Handler.prototype.activate.apply(this, arguments)) {
              this.moveLayerToTop();
              this.map.events.on({
                  "removelayer": this.handleMapEvents,
                  "changelayer": this.handleMapEvents,
                  scope: this
              });
              activated = true;
          }
          return activated;
      }
docs: Method: activate
  Turn on the handler.  Returns false if the handler was already active.
  
  Returns:
  {Boolean}