How to best display HTML5 geolocation accuracy on a Google Map?

To display HTML5 geolocation accuracy on a Google Map, use the following code −

var lat = position.coords.latitude;
var longitude = position.coords.longitude;
var accuracy = position.coords.accuracy;
var center = new google.maps.LatLng(lat, longitude);

var a = new google.maps.Marker({
   position: center
   map:
   icon:
});

var mySphere = new google.maps.Circle({
   center: centerPosition,
   radius: accuracy,
   map:
   fillColor:
   fillOpacity:
   strokeColor:
   strokeOpacity:
});
map.fitBounds(mySphere.getBounds());