If you can read the file on client side with JavaScript, what is the problem? CSV has no cells, it has rows, and fields. First row can be the header. Thus you simply need to read the lines until you reach the row you need, split the line by comas outside quotes (supposing that it is well formed), ant grab the element you need. This would be a really good start:
http://purbayubudi.wordpress.com/2008/11/09/csv-parser-using-javascript/[
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