Django Tracker HTML Template

<!DOCTYPE html>
<html>
<head>
  <meta http-equiv="content-type" content="text/html; charset=UTF-8" />
  <title>Google Maps Multiple Markers</title>
  <script src="http://maps.google.com/maps/api/js?sensor=false"
          type="text/javascript"></script>
</head>
<body>
  <div id="map" style="width: 1024px; height: 600px;"></div>

  <script type="text/javascript">
    var locations = [
      {% for l in locations %}
      ['{{ l.date }}', {{ l.latitude}}, {{ l.longitude}}, {{ l.id }}],
      {% endfor %}
    ];

    var map = new google.maps.Map(document.getElementById('map'), {
      zoom: 12,
      center: new google.maps.LatLng({{centerLA}}, {{centerLO}}),
      mapTypeId: google.maps.MapTypeId.ROADMAP
    });

    var infowindow = new google.maps.InfoWindow();

    var marker, i;

    for (i = 0; i < locations.length; i++) {
      marker = new google.maps.Marker({
        position: new google.maps.LatLng(locations[i][1], locations[i][2]),
        map: map
      });

      google.maps.event.addListener(marker, 'click', (function(marker, i) {
        return function() {
          infowindow.setContent(locations[i][0]);
          infowindow.open(map, marker);
        }
      })(marker, i));
    }
  </script>
</body>
</html>