title: How can I add layers to Here Maps?
body: <p>I am starting with here-api,I follow the examples and I add some markers in the map, but i nedd and a layer switcher, to select multiple layers with differents markers, and shown it in the map but i cant do it. The markers are, static and the map not reload the firt markers. </p>
  
  <p>I try to put more than one maps, in tabs, but not work. Some idea about it?</p>
  
  <p>Sorry for my english. 
  Regards.</p>