[OpenLayers-Users] how to query wms, like wfs?

[zach cruise]

to query wfs, i first specify layer, action and function:

        var query = new OpenLayers.Control.SelectFeature(wfs_layer,
                {       callbacks: { 'click': result }
        });

then in the function, i style the attributes returned:

        function result(feature) {
                var html = "";
                for (var i in feature.attributes) {
                        html += i + feature.attributes[i];
                }
                html += "";
                OpenLayers.Util.getElement('div').innerHTML = html;
        }

how do i do the same for wms
(http://mapserver.org/ogc/wms_server.html)? per
http://openlayers.org/dev/examples/getfeatureinfo-control.html, i
tried:

        var query = {
                click: new OpenLayers.Control.WMSGetFeatureInfo({
                        layers: [wms_layer]
                })
        };

        for (var i in query) {
                query[i].events.register("getfeatureinfo", this);
                map.addControl(query[i]); // instead of map.addControl(query) 
for wfs
        }

        query.click.activate(); // instead of query.activate() for wfs

but where do i specify the function to style the attributes returned,
like before?

and clicking on a wms feature returns this:

        <?xml version='1.0' encoding="ISO-8859-1" standalone="no" ?>
        <!DOCTYPE ServiceExceptionReport SYSTEM
"http://schemas.opengis.net/wms/1.1.1/exception_1_1_1.dtd";>
        <ServiceExceptionReport version="1.1.1">
                <ServiceException>
                        msWMSFeatureInfo(): WMS server error. Unsupported 
INFO_FORMAT value
(text/html).
                </ServiceException>
        </ServiceExceptionReport>

how do i fix INFO_FORMAT? (my map file =
MAP..WEB..METADATA.."wms_feature_info_mime_type"
"text/xml"..END..END..END).

working examples appreciated.
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