anchor.diff:   $(document).ready(function() {
   
     var mapOptions = {
  -    zoom: 6,
  +    zoom: 16,
       mapTypeId: google.maps.MapTypeId.ROADMAP
     };
  +
     map = new google.maps.Map(document.getElementById('map_canvas'),
         mapOptions);
   
  
positive.code:       var infowindow = new google.maps.InfoWindow({
          map: map,
          position: pos,
          content: 'Location found using HTML5.'
        });
  
        map.setCenter(pos);
  
negative.code: 
  <style>
  #map_canvas {
    width:  400px;
    height: 400px;
  }
  </style>
  
  <div id='coordinates'></div>
  <br>
  <div id='map_canvas'></div>
  
  <!-- End of tutorial code ------------------------------------------------------------  -->
  