title: Plotting several markers on google maps using nodejs
body: <p>I want to plot several markers on a Google Map. I'm using NodeJS to fetch the markers and HTML as front end.</p>
  
  <p>Here's the node script:</p>
  
  <pre><code>app.get('/blood',function(req,res){
    var l = [];
    l.push(['1',23.567,88.645,1]);
    l.push(['2',23.560,88.647,2]);
    console.log(JSON.stringify(l));
    res.render('../public/blood.ejs',{ layout: false, lat:23.567, lon:88.678, l:l});
  });
  </code></pre>
  
  <p>Here's the HTML:</p>
  
  <pre><code>&lt;script type="text/javascript"&gt;
        function initialize() {
  
          var locations = [
        ['Bondi Beach', -33.890542, 151.274856, 4],
        ['Coogee Beach', -33.923036, 151.259052, 5],
        ['Cronulla Beach', -34.028249, 151.157507, 3],
        ['Manly Beach', -33.80010128657071, 151.28747820854187, 2],
        ['Maroubra Beach', -33.950198, 151.259302, 1]
      ];
  
      var map = new google.maps.Map(document.getElementById('map-canvas'), {
        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 &lt; locations.length; i++) {  
        marker = new google.maps.Marker({
          position: new google.maps.LatLng(locations[i][1], locations[i][2]),
          map: map
        });
  
        google.maps.event.addListener(marker, 'click', (function(marker, i) {
          return function() {
            infowindow.setContent(locations[i][0]);
            infowindow.open(map, marker);
          }
        })(marker, i));
      }
        }
        google.maps.event.addDomListener(window, 'load', initialize);
      &lt;/script&gt;
  </code></pre>
  
  <p>I have used only static locations in the code. How can i dynamically use the markers on the Google Maps?</p>
  
  <p>Kindly suggest.
  Thanks.</p>
  
  <p>EDIT:</p>
  
  <p>It should look like:
  <img src="https://i.stack.imgur.com/DOWod.png" alt="enter image description here"></p>
  
  <p>Instead it does not render the map:</p>
  
  <p><img src="https://i.stack.imgur.com/lfpWX.png" alt="enter image description here"></p>