How to overlay WMS layer on OSM maps?

Question

I am using OSM/Google maps and WMS Layers. Now I want to know how my WMS will overlay on this map. I am using the following code for that:

function init()
             {
                map = new OpenLayers.Map('map');

                layer = new OpenLayers.Layer.OSM( "OpenStreet Map");
                map.addLayer(layer);
                layer = new OpenLayers.Layer.Google( "Google" );
                map.addLayer(layer);

                var jpl_wms = new OpenLayers.Layer.WMS("Administrative Layer",
                "http://localhost:8080/geoserver/test/wms", 
                {layers: "maharashtra_administrative",transparent: true,visibility: false},{isBaseLayer:false});
                map.addLayer(jpl_wms); 
                map.addControl(new OpenLayers.Control.LayerSwitcher());
                map.setCenter(new OpenLayers.LonLat(8461018,2120810),6.75);
                map.addControl(new OpenLayers.Control.MousePosition({}));
                map.addControl(new OpenLayers.Control.OverviewMap());
                map.addControl(new OpenLayers.Control.ScaleLine());
            }

Can anybody guide me for the same as this overlay does not appear in the map.

Answer 1

The parameter

visibility: false 

looks problematic to me. It's in the wrong place and will prevent your layer showing if it is in the right place.

Try something like:

var jpl_wms = new OpenLayers.Layer.WMS("Administrative Layer",
            "http://localhost:8080/geoserver/wms", 
            {layers: "topp:maharashtra_administrative",transparent: true},
            {isBaseLayer:false}
            );

Note I've assumed that you have placed your layer in the topp name space - you'd need to change that if you have created and used your own workspace.