code: function(point) {
          var node = this.createElementNS(this.namespaces.gpx, "trkpt");
          node.setAttribute("lon", point.x);
          node.setAttribute("lat", point.y);
          return node;
      }
docs: Method: buildTrkPtNode
  Builds a trkpt node given a point
  
  Parameters:
  point - {<OpenLayers.Geometry.Point>}
  
  Returns:
  {DOMElement} A trkpt node