diff --git a/loadgpx.js b/loadgpx.js
index eaef8fa..a9f5839 100644
--- a/loadgpx.js
+++ b/loadgpx.js
@@ -131,6 +131,8 @@ GPXParser.prototype.createMarker = function(point) {
     google.maps.event.addListener(marker, "click", function() {
         infowindow.open(this.map, marker);
     });
+    
+    return { marker: marker, infowindow: infowindow };
 }
 
 GPXParser.prototype.addTrackSegmentToMap = function(trackSegment, colour,
@@ -171,14 +173,18 @@ GPXParser.prototype.addTrackSegmentToMap = function(trackSegment, colour,
         strokeWeight: width,
         map: this.map
     });
+    return polyline;
 }
 
 GPXParser.prototype.addTrackToMap = function(track, colour, width) {
     var segments = track.getElementsByTagName("trkseg");
+    var result = [];
     for(var i = 0; i < segments.length; i++) {
-        var segmentlatlngbounds = this.addTrackSegmentToMap(segments[i], colour,
+        var polyline = this.addTrackSegmentToMap(segments[i], colour,
                 width);
+        result.push(polyline);
     }
+    return result;
 }
 
 GPXParser.prototype.addRouteToMap = function(route, colour, width) {