``True, I meant extensions (which can include JavaScript).'' ravi
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What is all this crap about email? I am using my shell account to avoid my work connection log reflect my email activity, so I am using `mail', the original unix email program...
Anyway, remember I tried to get you to go look at polars? Here is nice site that has JavaScript geometry to play with so you can `see' what these conformal transformation do:
http://www.cut-the-knot.org/ctk/Circle.shtml
CG