function initMap() {
    var directionsService = new google.maps.DirectionsService;
    var directionsDisplay = new google.maps.DirectionsRenderer;
    var map = new google.maps.Map(document.getElementById('map'), {
      zoom: 7,
      center: {lat: 41.85, lng: -87.65}
    });
    directionsDisplay.setMap(map);


    calculateAndDisplayRoute(directionsService, directionsDisplay);

  }
  function calculateAndDisplayRoute(directionsService, directionsDisplay) {
    directionsService.route({
      origin: {lat: 32.493241, lng: -116.928811},
      destination: {lat: 32.494404, lng: -116.851438},
      travelMode: 'DRIVING'
    }, function(response, status) {
      if (status === 'OK') {
        directionsDisplay.setDirections(response);
          console.log(response);
      } else {
        window.alert('Directions request failed due to ' + status);
      }
    });
  }