title: Leaflet map not loading
body: <p>I am very new to leaflet so I am only just trying to grasp the basics. When following the tutorial online provided by Leaflet, I am struggling to get the map to load. If I use the coordinates provided I have no issues, however if I change the coordinates, nothing loads.</p>
  
  <p>Can anyone help? Here's what I have:</p>
  
  <pre><code>&lt;!DOCTYPE html&gt;
    &lt;html&gt;
     &lt;head&gt;
      &lt;title&gt;Leaflet Web Map&lt;/title&gt;
      &lt;link rel="stylesheet" href="http://cdn.leafletjs.com/leaflet-0.7.3/leaflet.css" /&gt;
      &lt;script src="http://cdn.leafletjs.com/leaflet-0.7.3/leaflet.js"&gt;&lt;/script&gt;
   &lt;style&gt;
    #map {
    width: 960px;
    height:500px;
    }
  &lt;/style&gt;
  &lt;/head&gt;
  
  
  &lt;body&gt;
  &lt;div id="map"&gt;&lt;/div&gt;
  </code></pre>
  
  <p>
  </p>
  
  <pre><code>&lt;script&gt;
     var map = L.map('map',{
      center: [43.64701, -79.39425],
      zoom: 15
     });
     L.tileLayer('http://{s}.tile.osm.org/{z}/{x}/{y}.png', {
     attribution: '&amp;copy; &lt;a href="http://osm.org/copyright"&gt;OpenStreetMap&lt;/a&gt; contributors'
    }).addTo(map);
   &lt;/script&gt;
  </code></pre>
  
  <p>this loads no bother but if I change the coordinates at all it doesn't load.</p>