JSON Markers + toggle categories

JSON Markers + toggle categories

by Alex Azuero

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 = [
      ['Bondi Beach', 'Some text goes here<br />text', 'Walk', -33.890542, 151.274856, 4],
      ['Coogee Beach', 'Some text goes here<br />text', 'Fish', -33.923036, 151.259052, 5],
      ['Cronulla Beach', 'Some text goes here<br />text', 'Fish', -34.028249, 151.157507, 3],
      ['Manly Beach', 'Some text goes here<br />text', 'Walk', -33.80010128657071, 151.28747820854187, 2],
      ['Maroubra Beach', 'Some text goes here<br />text', 'Walk', -33.950198, 151.259302, 1]
    ];

    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][3], locations[i][4]),
        map: map,
           animation: google.maps.Animation.DROP
      });
        
        markers.push(marker);
        
      google.maps.event.addListener(marker, 'click', (function(marker, i) {
        return function() {
          infowindow.setContent(locations[i][0]+"<br />"+locations[i][2]+"<br />"+locations[i][1]);
          infowindow.open(map, marker);
        }
      })(marker, i));
    }
    
    
    

    // == shows all markers of a particular category, and ensures the checkbox is checked ==
      function show(category) {
        for (var i=0; i<locations.length; i++) {
          if (locations[i][2] == category) {
            markers[i].setVisible(true);
          }
        }
      }

      // == hides all markers of a particular category, and ensures the checkbox is cleared ==
      function hide(category) {
        for (var i=0; i<locations.length; i++) {
          if (locations[i][2] == category) {
            markers[i].setVisible(false);
          }
        }
      }
      
      // == show or...