title: Google maps set only the selected marker draggable
body: <p>Is it possible to drag only the selected marker on google maps, i'am now using this code: </p>
  
  <pre><code> google.maps.event.addListener(marker, 'click', function() {  
          this.setDraggable(true);
      });
  </code></pre>
  
  <p>But now, when you click on another marker, the previous selected marker is also draggable.</p>
  
  <p>Kind regards,
  Gjjansen</p>