docs: function(closeBox) {
  
          if (this.lonlat != null) {
              if (!this.popup) {
                  var anchor = (this.marker) ? this.marker.icon : null;
                  var popupClass = this.popupClass ? 
                      this.popupClass : OpenLayers.Popup.Anchored;
                  this.popup = new popupClass(this.id + "_popup", 
                                              this.lonlat,
                                              this.data.popupSize,
                                              this.data.popupContentHTML,
                                              anchor, 
                                              closeBox); 
              }    
              if (this.data.overflow != null) {
                  this.popup.contentDiv.style.overflow = this.data.overflow;
              }    
              
              this.popup.feature = this;
          }        
          return this.popup;
      }