Untitled

<!DOCTYPE html>
   <html>
   <head>
   <meta http-equiv="content-type" content="text/html; charset=UTF-8"/>
   <title>Google Maps JavaScript API v3 Example: Marker Categories</title>
       <script type="text/javascript"
               src="http://maps.google.com/maps/api/js?sensor=false"></script>
       <script src="http://code.jquery.com/jquery-2.2.0.min.js"></script>
   </head>
   <body>
    <div id="map" style="width: 400px; height: 300px;"></div>

    <input type="checkbox" value="Show Group 1" onclick="displayMarkers(this,1);">
    <input type="checkbox" value="Show Group 2" onclick="displayMarkers(this, 2);">

    <script type="text/javascript">

    var beaches = [
      ['Bondi Beach', -33.890542, 151.274856, 1,],
      ['Coogee Beach', -33.923036, 151.259052, 1],
      ['Cronulla Beach', -34.028249, 151.157507, 2],
      ['Manly Beach', -33.800101, 151.287478, 2],
      ['Maroubra Beach', -33.950198, 151.259302, 2]
    ];

    var map = new google.maps.Map(document.getElementById('map'), {
       zoom: 10,
       center: new google.maps.LatLng(-33.88, 151.28),
       mapTypeId: google.maps.MapTypeId.ROADMAP
    });

    var markers = [];

    var i, newMarker;

    for (i = 0; i < beaches.length; i++) {
      newMarker = new google.maps.Marker({
      position: new google.maps.LatLng(beaches[i][1], beaches[i][2]),
      map: map,
      title: beaches[i][0]
    });

    newMarker.category = beaches[i][3];
    newMarker.setVisible(false);

    markers.push(newMarker);
    }

     function displayMarkers(obj,category) {
         var i;

         for (i = 0; i < markers.length; i++)
         {
                 if (markers[i].category === category) {
                     if ($(obj).is(":checked")) {

                         markers[i].setVisible(true);
                     } else {
                         markers[i].setVisible(false);
                     }
                 }
                 else
                 {
                     markers[i].setVisible(false);
                 }
             }


     }

   </script>
   </body>
   </html>