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I would also like to know how to implement commas on your current version..,

You must set excell to "edn" and execute the next command:

            mygrid.setNumberFormat("$0,000.00",0);

This command must be executed before loading data in grid.

( the second parameter of setNumberFormat is index of column for which formatting applied )

 
Please check samples/pro_format.html

 Alternatively you can write custom excell for any kind of formatting

The information connected with combo box calendar and web based event calendar also can help you, so please check it too.