code: function () {
          if (this.active) {
              return false;
          }
          if (this.handler) {
              this.handler.activate();
          }
          this.active = true;
          if(this.map) {
              OpenLayers.Element.addClass(
                  this.map.viewPortDiv,
                  this.displayClass.replace(/ /g, "") + "Active"
              );
          }
          this.events.triggerEvent("activate");
          return true;
      }
docs: APIMethod: activate
  Explicitly activates a control and it's associated
  handler if one has been set.  Controls can be
  deactivated by calling the deactivate() method.
  
  Returns:
  {Boolean}  True if the control was successfully activated or
  false if the control was already active.