Read excel from Acrobat Javascript

Hi,

Our requirement is to upload an excel from pdf form, parse it and display it in table format.

I could get the excel through upload button and the code is given below :

var myDoc = event.target;

myDoc.importDataObject({cName: sFile });

var rstr = myDoc.getDataObjectContents(sFile);

var vFile = util.stringFromStream(rstr, "utf-8");  

But when i print vFile variable value, it is throwing some junk characters.

Please help me in getting the excel data from particular sheet in excel.

Regards,

Sudha