<html>
<head>
<title>OpenLayers Example</title>
<script src="http://openlayers.org/api/OpenLayers.js"></script>
<script src="http://openstreetmap.org/openlayers/OpenStreetMap.js"></script>
</head>
<body>
<div style="width:100%; height:100%" id="map"></div>
<script defer="defer" type="text/javascript">
var map = new OpenLayers.Map('map');
var osm = new OpenLayers.Layer.OSM.Mapnik("Mapnik");
map.addLayer(osm);
map.zoomToMaxExtent();
</script>
</body>
</html>