title: Google Map v3 Getting center of circle?
body: <p>i'm using google v3 js and i am trying to get the center of the circle whenever the person drag the circle or expand the circle. currently i do not know any event that is able to tigger that</p>
  
  <pre><code>  &lt;script type="text/javascript"&gt;
  
      var latt = 1.3738459931841047;
      var longg = 103.79745483398437;
      var radius = 1000;
  
      function alertame(lat, long) {
          document.getElementById("&lt;%= lblLatitute.ClientID %&gt;").textContent = lat;
          document.getElementById("&lt;%= lblLongitude.ClientID %&gt;").textContent = long;
          latt = lat;
          longg = long;
      }
  
  
  
      function show_alert() {
          alert(latt + "hello"+radius);
      }
      function initialize() {
          var myOptions = {
              center: new google.maps.LatLng(1.3738459931841047, 103.79745483398437),
              zoom: 11,
              mapTypeId: google.maps.MapTypeId.ROADMAP
          };
  
  
  
          var map = new google.maps.Map(document.getElementById("map_canvas"),
          myOptions);
  
          var circleOptions = {
              center: new google.maps.LatLng(latt, longg),
              radius: radius,
              map: map,
              editable: true
          };
          var circle = new google.maps.Circle(circleOptions);
          google.maps.event.addListener(circle, 'radius_changed', function () {
              radius = circle.getRadius();
  
              alert("test");
          });
          google.maps.event.addListener(circle, 'drag', function () {
  
              alert("test");
          });
          circle.setMap(map);
      }
  
  
  
  
  &lt;/script&gt;
  
  
  
  &lt;style type="text/css"&gt;
      .style1
      {
          width: 124px;
      }
  &lt;/style&gt;
  </code></pre>