How to get latitude and longitude from google maps v3 api?

I am trying create a map using google maps v3 api. I have found the below code over internet and I want to show the latitude and logitude in map window instead of address.

<script>
      function initialize() {
        var mapOptions = {
          center: new google.maps.LatLng(-33.8688, 151.2195),
          zoom: 13,
          mapTypeId: google.maps.MapTypeId.ROADMAP
        };
        var map = new google.maps.Map(document.getElementById('map_canvas'),
          mapOptions);

        var input = document.getElementById('searchTextField');
        var autocomplete = new google.maps.places.Autocomplete(input);

        autocomplete.bindTo('bounds', map);

        var infowindow = new google.maps.InfoWindow();
        var marker = new google.maps.Marker({
          map: map
        });

        google.maps.event.addListener(autocomplete, 'place_changed', function() {
          infowindow.close();
          marker.setVisible(false);
          input.className = '';
          var place = autocomplete.getPlace();
          if (!place.geometry) {
            // Inform the user that the place was not found and return.
            input.className = 'notfound';
            return;
          }

          // If the place has a geometry, then present it on a map.
          if (place.geometry.viewport) {
            map.fitBounds(place.geometry.viewport);
          } else {
            map.setCenter(place.geometry.location);
            map.setZoom(17);  // Why 17? Because it looks good.
          }
          var image = {
            url: place.icon,
            size: new google.maps.Size(71, 71),
            origin: new google.maps.Point(0, 0),
            anchor: new google.maps.Point(17, 34),
            scaledSize: new google.maps.Size(35, 35)
          };
          marker.setIcon(image);
          marker.setPosition(place.geometry.location);
          marker.setVisible(true);

          var address = '';
          if (place.address_components) {