[OpenLayers-Users] getFeatureInfo problem

[vrbikdan]

Hi, 
I have a problem with getFeatureInfo. I tried several ways of set it, but 
nothing work. My problem is, that I want if I click on some point in the map, 
that in some div will show some information about this point. I use this code I 
found here http://openlayers.org/dev/examples/getfeatureinfo-control.html :

infoControls = {
            click: new OpenLayers.Control.WMSGetFeatureInfo({
                url: 'http://localhost:8080/geoserver/wms', 
                title: 'Identify features by clicking',
                layers: [bodyVsechny],
                queryVisible: true
            })
		};
		
		for (var i in infoControls) { 
            infoControls[i].events.register("getfeatureinfo", this, showInfo);
            map.addControl(infoControls[i]); 
        };
		
		infoControls.click.activate();
        
		
		function showInfo(evt) {
        if (evt.features && evt.features.length) {
             highlightLayer.destroyFeatures();
             highlightLayer.addFeatures(evt.features);
             highlightLayer.redraw();
        } else {
            $('infoDiv').innerHTML = evt.text;
        }
		};

But if i click on some point, nothing happend and java console write me this but 
I can't follow: 

XMLHttpRequest cannot load http://localhost:8080/geoserver/wms?
SERVICE=WMS&VERSION=1.1.1&REQUEST=GetFeatureInfo&LAYERS=dp%3Adp1&QUERY_LAYERS=dp
%3Adp1&STYLES=&BBOX=1643701.855782%2C6571405.975387%2C1741541.25197%2C6623765.33
9753&FEATURE_COUNT=10&HEIGHT=685&WIDTH=1280&FORMAT=image%2Fpng&INFO_FORMAT=text%
2Fhtml&SRS=EPSG%3A900913&X=437&Y=470. Origin null is not allowed by Access-
Control-Allow-Origin.

GET http://localhost:8080/geoserver/wms?
SERVICE=WMS&VERSION=1.1.1&REQUEST=GetFeatureInfo&LAYERS=dp%3Adp1&QUERY_LAYERS=dp
%3Adp1&STYLES=&BBOX=1643701.855782%2C6571405.975387%2C1741541.25197%2C6623765.33
9753&FEATURE_COUNT=10&HEIGHT=685&WIDTH=1280&FORMAT=image%2Fpng&INFO_FORMAT=text%
2Fhtml&SRS=EPSG%3A900913&X=437&Y=470 undefined (undefined)

Please, can you help me? I'm quite desperate :(
Thanks, Dan

P.S. I don't know, what I should write here, what do you need to see from my 
code...