title: Get a parameter from a binded element in Google Maps
body: <p>Previously I <a href="https://stackoverflow.com/questions/3923283/hide-a-circle-along-with-the-binded-marker">get an answer</a> to the linking of an element. My next question is: how can I get the "radius" parameter of a binded circle, from the marker?</p>
  
  <p>The code:</p>
  
  <pre><code>var marker = new google.maps.Marker({
    position: new google.maps.LatLng(lat,lng),
  });
  var circle = new google.maps.Circle({
    map: map, 
    radius: 50,
  });
  circle.bindTo('map', marker);
  circle.bindTo('center', marker, 'position');
  Array.push(marker);
  </code></pre>
  
  <p>I need the cirlce's radius, which binded to the Array[x] marker. Any idea? Thanks in advance!</p>