Convert All Currencies on a particular page.

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.NET3.5

C#

ASP

ASP.NET

Javascript

, +

I want Currency Converter like the way currency converter in http://www.cleartrip.com/

After Searching Flights it will Show the results with Indian Currency.

When i Choose "US Dollar" the Search Resulting page Flight Fairs are Automatically Converted into
US Dollar. Not Only Flight Fair it is converting all Indian Currency into US Dollar on that Page


I Don't have any idea about how they implement this concept..

Can Anyone give some idea about this..?

Thanks in Advance!!!!