[OpenLayers-Users] Filter Encoding

[Fabio D'Ovidio]

Hi!
I am trying to do as following:

var poligono = new OpenLayers.Layer.WFS(
                "Elementi poligonali",
                "/geoserver/wfs",
                {typename: 'topp:poligono'},
                {
                    typename: 'poligono',
                    featureNS: 'http://www.openplans.org/topp',
                    extractAttributes: true,
                    filter:  
'<Filter><PropertyIsEqualTo><PropertyName>idOperazione</PropertyName><Literal>'+OpenLayers.Util.getParameters();+'</Literal></PropertyIsEqualTo></Filter>'
               
               
               
                }
            );


It doesn't work! How can I filter my WFS data ?

Tnaks !

-- 
Ing. Fabio D'Ovidio

INOVA Open Solutions s.r.l.
Web : http://www.inovaos.it
Tel.: 081 197 57 600
mail: fabiodovidio at gmail.com