Read CSV row, then update same CSV row

[ggandhi]

The following JScript code enables me to read a CSV file and build a Sparx Node per row. Please can you show me how to write back to the same CSV row, updating a spare column?
 
var fsObject = new ActiveXObject( "Scripting.FileSystemObject" );
var file = fsObject.GetFile( fileName );
var inputStream = file.OpenAsTextStream( FSREAD, 0 );
// Read the file a row at a time
while ( !inputStream.AtEndOfStream )
{
// Get the current line and split it into segments based on the CSV_DELIMITER
var currentLine = inputStream.ReadLine();
var currentLineTokens = currentLine.split( CSV_DELIMITER );

[qwerty]

You are better served to ask such a question at StackOverflow (after searching there) since this is not EA related.

q.