code: function(id, lonlat, contentSize, contentHTML, anchor, closeBox,
                          closeBoxCallback) {
          var newArguments = [
              id, lonlat, contentSize, contentHTML, closeBox, closeBoxCallback
          ];
          OpenLayers.Popup.prototype.initialize.apply(this, newArguments);
  
          this.anchor = (anchor != null) ? anchor 
                                         : { size: new OpenLayers.Size(0,0),
                                             offset: new OpenLayers.Pixel(0,0)};
      }
docs: Constructor: OpenLayers.Popup.Anchored
  
  Parameters:
  id - {String}
  lonlat - {<OpenLayers.LonLat>}
  contentSize - {<OpenLayers.Size>}
  contentHTML - {String}
  anchor - {Object} Object which must expose a 'size' <OpenLayers.Size>
  and 'offset' <OpenLayers.Pixel> (generally an <OpenLayers.Icon>).
  closeBox - {Boolean}
  closeBoxCallback - {Function} Function to be called on closeBox click.