anchor.diff:        position.coords.latitude,
         position.coords.longitude)
     );
  +}
  +
  +function placeUserAndSoundTrekMarkers(position) {
  +  setMarkerPosition(currentPositionMarker, position);
  +  getSoundTreks(map, position);
   }
   
   var geolocationOptions = {
  
positive.code: 
  function watchCurrentPosition() {
    var positionTimer = navigator.geolocation.watchPosition(
      function (position) {
        setMarkerPosition(
          currentPositionMarker,
          position
        ),
      locError,
      geolocationOptions
    });
    // getSoundTreks(map, position);
  }
  
  function setMarkerPosition(marker, position) {
  
negative.code:   if (navigator.geolocation) {
      navigator.geolocation.getCurrentPosition(displayAndWatch, locError, geolocationOptions);
    } else {
      alert("Your browser does not support geolocation.");
    }
  }
  
  function getSoundTreks(map, position){
   $.ajax({
     url: '/sound_treks',
     type: 'GET',
     data: {lat: position.coords.latitude, lng: position.coords.longitude} // user's current position sent to server
   })
   .done(function(response) {
      var allMarkers = [];
      for (var i = 0; i < response.length; i++){
        var marker = new google.maps.Marker({
          position: new google.maps.LatLng(response[i].latitude, response[i].longitude),
          icon: soundTrekIcon,
          map: map,
          soundtrekId: response[i].id
        });
         allMarkers.push(marker);
      }
      for (var x = 0; x < allMarkers.length; x++){
        getMarker(allMarkers[x]);
      }
    });
  }
  
  // function getCurrentLocation() {
  //   if (navigator.geolocation) {
  