var container = document.getElementById('map');

var panorama = new google.maps.StreetViewPanorama(
  container,
  {
    pano: 'grid',
    panoProvider: function(pano) { return AVAILABLE_PANORAMAS[pano]; }
  });

var marker = new PanoMarker(
  {
    pano: panorama,
    anchor: new google.maps.Point(16,32)
  });