var Demo = {
  // API Objects
  dirService: new google.maps.DirectionsService(),
  dirRenderer: new google.maps.DirectionsRenderer(),
  map: null,

  showDirections: function(dirResult, dirStatus) {
    if (dirStatus != google.maps.DirectionsStatus.OK) {
      alert('Directions failed: ' + dirStatus);
      return;
    }
    // Show directions
    Demo.dirRenderer.setMap(Demo.map);
    Demo.dirRenderer.setPanel(Demo.dirContainer);
    Demo.dirRenderer.setDirections(dirResult);
  },

  getSelectedTravelMode: function() {
    var value =
        Demo.travelModeInput.options[Demo.travelModeInput.selectedIndex].value;
    if (value == 'driving') {
      value = google.maps.DirectionsTravelMode.DRIVING;
    } else if (value == 'walking') {
      value = google.maps.DirectionsTravelMode.WALKING;
    } else {
      alert('Unsupported travel mode.');
    }
    return value;
  },
  
  getDirections: function() {
	Demo.marker.setMap(null);
	
    var fromStr = Demo.fromInput.value;
    var toStr = Demo.toInput.value;
    var dirRequest = {
      origin: fromStr,
      destination: toStr,
      travelMode: google.maps.DirectionsTravelMode.DRIVING,
      unitSystem: google.maps.DirectionsUnitSystem.METRIC,
      provideTripAlternatives: true
    };
    Demo.dirService.route(dirRequest, Demo.showDirections);
  },

  init: function() {
    var latLng = new google.maps.LatLng(45.664506,12.22892);
	Demo.mapContainer = document.getElementById('map-container');
  	Demo.dirContainer = document.getElementById('dir-container');
  	Demo.fromInput = document.getElementById('from-input');
	Demo.toInput = document.getElementById('to-input');
  	Demo.travelModeInput = document.getElementById('travel-mode-input');
    Demo.map = new google.maps.Map(Demo.mapContainer, {
      zoom: 13,
      center: latLng,
      mapTypeId: google.maps.MapTypeId.ROADMAP
    });
	var contentString = "<strong>Dr Pier Andrea Cicogna</strong><br />Via Monterumici 8/4<br />31100 Treviso - Italy<br /> Tel. +39 0422 541204<br />Fax. +39 0422 419013";
	var infowindow = new google.maps.InfoWindow({
    	content: contentString
	});
	Demo.marker = new google.maps.Marker({
      position: latLng, 
      map: Demo.map, 
  	});
	google.maps.event.addListener(Demo.marker, 'click', function() {
  		infowindow.open(Demo.map,Demo.marker);
	});
  }
};
google.maps.event.addDomListener(window, 'load', Demo.init);