I have just started looking into OpenLayers and I can't seem to even get the [example][1] provided to work, I just get a blank screen.
Am I missing something really obvious? Here's the html I am trying to run.
Many thanks!
<html>
<head>
<title>OpenLayers Example</title>
<script src="http://openlayers.org/api/OpenLayers.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 wms = new OpenLayers.Layer.WMS( "OpenLayers WMS",
"http://vmap0.tiles.osgeo.org/wms/vmap0", {layers: 'basic'} );
map.addLayer(wms);
map.zoomToMaxExtent();
</script>
</body>
</html>
[1]: http://docs.openlayers.org/library/introduction.html#putting-it-all-together