OK- So it looks like you have several instances of the LayerSwitcher control
in your code (see lines 46, 62, 219). This is why it does not appear to hide
correctly. Remove 2 of these controls and you should be all set.
As for your "layer not defined" error... I was assuming that you were
trying to hide a layer when the map initially loads. So if you wanted the
"Hofladen" layer to be initially hidden and unchecked, you would have to set
the layer as a variable and use setVisibility(false);.
var hofladen = new OpenLayers.Layer.PopupMarker("Hofladen", { ...
map.addLayer(hofladen);
hofladen.setVisibility(false);
-----
Bryan R. McBride, GISP
http://www.bryanmcbride.com bryanmcbride.com
http://geoserving.net/ geoserving.net
--
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