title: The Hidden markers show in cluster icon in google map api v3
body: <p>I used google map api in my project with cluster (MarkerClusterer)</p>
  
  <pre><code>var markers=[];
  for(var i=0;i&lt;1000;i++)
  { //create marker
      markers.push(marker):
  }
   markerclusterer = new MarkerClusterer(map, markers);
  // then .. in another part .. i do .
  for(var j=0;j&lt;200;j++)
  {
  markers[j].setVisible(false);
  }
  markerclusterer.draw();
  </code></pre>
  
  <p>the problem ::</p>
  
  <p>its hide the 200 markers but in cluster icon its still ..</p>
  
  <p>i mean .. ( if i calculate the numbers shown in cluster icon =1000) . but actually 800 markes is visible and 200 are hidden.) </p>
  
  <p>how to make the cluster icon =800 only.
  ..thnx  </p>