title: Resize markers depending on zoom Google maps v3
body: <p>I have a Google map running on the v3 API, I added some custom markers, is it possible to make them scale depending on the zoom level of the map?
  I tried searching the reference but can't seem to find any methods to resize a MarkerImage.</p>
  <p>Maybe I have to remove markers everything the map changes zoom and create new markers in a different size?</p>