You need to define a height and width for your GeoExt.MapPanel:
new GeoExt.MapPanel({
renderTo : 'gxMap',
map : map,
height : 560,
width : 710,
title : 'Afghanistan Elections Data',
header : false,
center : centrePoint.transform(new
OpenLayers.Projection("EPSG:4326"),
map.getProjectionObject()),
zoom : initZoom
});
-----
Bryan R. McBride, GISP
http://www.bryanmcbride.com bryanmcbride.com
http://geoserving.net/ geoserving.net
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