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<script type="text/javascript">

        // Add the WMS
        var layer = new OpenLayers.Layer.WMS(
          "WMS",
          "http://localhost:80803geoserver/thesis/wms",
          {
            LAYERS: 'thesis:ensch',transparent: true
          },
          {
            singleTile:true,
            isBaseLayer: false
          }
        );
        map.addLayer(layer);

        // Center the map
        map.setCenter(new OpenLayers.LonLat(52.222, 6.893);

      }

    </script>
  </head>
  <body onload="init()">

    <div id="map"></div>
  </body>
</html>