JSON Markers + toggle categories

JSON Markers + toggle categories

HTML

<div id="map" style="width: 500px; height: 400px;"></div>
<script src="http://maps.google.com/maps/api/js?sensor=false" type="text/javascript"></script>

<label>All<input type="checkbox" name="selectAll" id="all" /></label>
<input type='checkbox' name="filterpins" rel="Fish">Fish</input>
<input type='checkbox' name="filterpins" rel="Walk">Walk</input>

JavaScript

var markers = new Array(); 
    var locations = [
      [-33.890542, 151.274856],
      [-33.923036, 151.259052]
    ];

    var map = new google.maps.Map(document.getElementById('map'), {
      zoom: 10,
      center: new google.maps.LatLng(-33.92, 151.25),
      mapTypeId: google.maps.MapTypeId.ROADMAP
    });

    var infowindow = new google.maps.InfoWindow();

    var marker=[], i;

    for (i = 0; i < locations.length; i++) {  
      marker = new google.maps.Marker({
        position: new google.maps.LatLng(locations[i][0], locations[i][1]),
        map: map,
           animation: google.maps.Animation.DROP
      });
        
        markers.push(marker);
        
    
    }