If you don't have any other polys, ground overlays or layers, I thought
it might be possible to render your circles at 100% opacity, and then
use a style setting to make the whole pane partially opaque.
var pane = map.getPane(G_MAP_OVERLAY_LAYER_PANE );
var opacity=0.5;
if(typeof(pane.style.filter)=='string'){
pane.style.filter='alpha(opacity:'+opacity*100+')';
}
if(typeof(pane.style.KHTMLOpacity)=='string'){
pane.style.KHTMLOpacity=opacity;
}
if(typeof(pane.style.MozOpacity)=='string'){
pane.style.MozOpacity=opacity;
}
if(typeof(pane.style.opacity)=='string'){
pane.style.opacity=opacity;
}
The only slight problem is that MSIE doesn't seem to be able to plot VML
graphics in a partially opaque container.
--
http://econym.org.uk/gmap
The Blackpool Community Church Javascript Team
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