How to highlight several countries using Google Chart API by country code? -

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i have simple request selects country on map code (e.g. fr france) in google chart:

http://chart.apis.google.com/chart?&cht=t&chs=440x220&chtm=europe&chco=f5f5f5,edf0d4,6c9642,13390a&chld=fr&chd=s:fr

i know can extended selecting several countries cannot construct proper request. can give example of how (e.g. highlighting fr , it)?

i think got syntax more or less:

http://chart.apis.google.com/chart?&cht=t&chs=440x220&chtm=europe&chco=f5f5f5,edf0d4,6c9642,13390a&chld=fr|it|cz|de&chd=s:afhx

so 1 should use "|" separate countries , provide enough color using alphanumeric encoding (1 char per country)


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