    map: map,
            center: center,
            radius: 500
          };
          Circle = new google.maps.Circle(CircleOptions);

          //circle 2
          var CircleOptions = {
            strokeColor: 'red',
            strokeOpacity: 0.8,
            strokeWeight: 2,
            fillColor: 'red',
            fillOpacity: 0.35,
            map: map,
            center: center,
            radius: 300
          };
          Circle = new google.maps.Circle(CircleOptions);

        }

        go