GeoExt Tree Example Modification

Question

The example provided in http://api.geoext.org/1.0/examples/tree.html shows all overlayes are checked but how do I make these overlayes unchecked while page is loaded?

Answer 1

On

<input class="x-tree-node-cb" type="checkbox" checked="">

Off

<input class="x-tree-node-cb" type="checkbox">

Recommend you use Firefox and Firebug to view the source live when and can interactively select objects and change their state and see the source code change.

Answer 2

When you make a call to the (WMS) layer and specify the parameters & options, you can set the visibility to false -

    wmsLayer = new OpenLayers.Layer.WMS("wms", "http://os2k239.ordsvy.gov.uk/geoserver/wms?",
         {
                layers: "layer 1",
                format: 'image/png'
            },
            {singleTile: true, isBaseLayer: false, buffer: 0, **visibility: false**}
        );

I hope this helps.