Le portail francophone de la géomatique

Code:

[...]
map.events.register('click', map, function (e) {                     
                        var params = {
                            REQUEST: "GetFeatureInfo",
                            EXCEPTIONS: "application/vnd.ogc.se_xml",
                            BBOX: map.getExtent().toBBOX(),
                            X: e.xy.x,
                            Y: e.xy.y,
                            INFO_FORMAT: 'application/vnd.ogc.gml',
                            QUERY_LAYERS: map.layers[0].params.LAYERS,
                            FEATURE_COUNT: 50,
                            Srs: 'EPSG:27574',
                            Styles: '',
                            Layers: 'topp:Access-Geo_AnalyseCommunes2',
                            WIDTH: map.size.w,
                            HEIGHT: map.size.h,
                            format: 'image/png'};
                        OpenLayers.loadURL("http://localhost:8080/geoserver/wms", params, this, sethtml, sethtml);
                        
                        OpenLayers.Event.stop(e);
                    });

            function sethtml(req){
            //req.responseXML me retourne "null"
             }
[...]