[OpenLayers-Users] bounds of an overlaylayer

[runningcodez]

Hi,

I have a base googlemap layer over which i have 1 overlay.The overlay layer
has its own bound values
given by my geoserver.my requirement is  to get the the bound values of the
overlay layer and zoom to that bounds,along with the base google layer,on a
buton click.Could anybody guide me as to how would i fetch the original
bounds generated by the geoserver...My code is is as follows..
thanx in advance



   function setupMapsOnload(){
        
        
            var options = {
                projection: "EPSG:900913",                                                
                maxResolution: 156543.0339,                                               
                maxExtent: new OpenLayers.Bounds(-20037508, -20037508,
20037508, 20037508.34),
                controls:[]
            };
            map = new OpenLayers.Map('map', options);
            
            gooPHY = new OpenLayers.Layer.Google(
                        "GoogleMap" ,
                        {
                            type: G_PHYSICAL_MAP,
                            'sphericalMercator': true,
                            minZoomLevel: 4,
                            maxZoomLevels:15
                        },
                        {
                            isBaseLayer: true,
                            buffer: 1,
                        }
            );
            
            ovlay = new OpenLayers.Layer.WMS(
                            "ibin:gridcenter",
                            "http://localhost/geoserver/wms",
                            {
                                layers: 'ibin:gridcenter',
                                srs: 'EPSG:4326',
                                height: '550',
                                width: '350',
                                styles: '',
                                format: format,
                                tiled: 'true',
                                tilesOrigin : "72.7,7.696875",
                                transparent: true
                            },
                            {
                                'opacity': 1, 'isBaseLayer': false,
'wrapDateLine': true
                            } 
            );
            
            map.addLayers([gooPHY,ovlay]);
            
            }
            
            function fetchbounds(){
                //the button click takes me here
                //here is where i shud fill in
            
            }
        </script>    
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