There are four different polyline technologies, and the opacity 
implementation is different in each one.

If AIR announces itself as Webkit, then the API probably chooses the 
<canvas> technology. AIR is based on an early release of Webkit that 
implements an earlier draft of the <canvas> design than ever got 
implemented in Safari.

You might get an idea about whether AIR supports <canvas> opacity by 
viewing this Mozilla sample page in AIR and Safari or Firefox and 
comparing the renderings.

https://developer.mozilla.org/samples/canvas-tutorial/4_4_canvas_rgba.htm
l

-- 
http://econym.org.uk/gmap
The Blackpool Community Church Javascript Team


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