If you have no polygons, polylines or ground overlays, you can set the
opacity of map.getPane(G_MAP_OVERLAY_LAYER_PANE).
All the children of that pane (tile layers, polys and ground overlays)
will be affected, unless the browser is MSIE and the API thinks that the
images are transparent PNGs. (MSIE doesn't support partial opacity when
using AlphaImageLoader).
var pane = map.getPane(G_MAP_OVERLAY_LAYER_PANE);
var percentopacity = 50;
if(typeof(pane.style.filter)=='string'){
pane.style.filter='alpha(opacity:'+this.percentOpacity+')';}
if(typeof(pane.style.KHTMLOpacity)=='string'){
pane.style.KHTMLOpacity=this.percentOpacity/100;}
if(typeof(pane.style.MozOpacity)=='string'){
pane.style.MozOpacity=this.percentOpacity/100;}
if(typeof(pane.style.opacity)=='string'){
pane.style.opacity=this.percentOpacity/100;}
Four different syntaxes for different browsers.
--
Mike Williams
http://econym.org.uk/gmap
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