code: function() {
          if (this.hoverRequest) {
              --this.pending;
              if (this.pending <= 0) {
                  OpenLayers.Element.removeClass(this.map.viewPortDiv, "olCursorWait");
                  this.pending = 0;
              }            
              this.hoverRequest.abort();
              this.hoverRequest = null;
          }
      }
docs: Method: cancelHover
  Cancel callback for the hover handler