code: function(bounds, zoomChanged, minor) {
          OpenLayers.Layer.Markers.prototype.moveTo.apply(this, arguments);
          if(this.visibility && !this.loaded){
              this.loadRSS();
          }
      }
docs: Method: moveTo
  If layer is visible and RSS has not been loaded, load RSS.
  
  Parameters:
  bounds - {Object}
  zoomChanged - {Object}
  minor - {Object}