Email a Excel-CSV (Table) SJIS

//// == Config Retrieving ==
var dataIdA = configs.get( "conf_DataIdA" ); // (returns Number)
var colIds = configs.get( "conf_ColIds" ) + "";
var dataIdC = configs.get( "conf_DataIdC" ); // (returns Number)
var dataIdD = configs.get( "conf_DataIdD" ); // (returns Number)
var dataIdE = configs.get( "conf_DataIdE" ); // (returns Number)
var fromAddress = configs.get( "conf_FromAddress" );
var fromName = configs.get( "conf_FromName" );
var replyToAddress = configs.get( "conf_ReplyToAddress" );
var replyToName = configs.get( "conf_ReplyToName" );
var dataIdJ = configs.get( "conf_DataIdJ" ); // (returns Number)
var dataIdK = configs.get( "conf_DataIdK" ); // (returns Number)

//// == Data Retrieving ==
var myTable = data.get( dataIdA );
// myTable: com.questetra.bpms.core.model.formdata.ListArray
var toAddress = data.get( dataIdC ) + "";
var toName = data.get( dataIdD ) + "";
var subject = data.get( dataIdE ) + "";
var myBody = data.get( dataIdJ ) + "";
var myFileName = data.get( dataIdK ) + "";

//// == Calculating ==
if( myTable !== null){
  var colIdArray = colIds.split(",");
  var numOfCols = colIdArray.length;
  var numOfRows = myTable.size() - 0; // 行（Tableの高さ）

  var myTsv = "";
  for( var i = 0; i < numOfRows; i++ ){
    for( var j = 0; j < numOfCols; j++ ){
      if( j != numOfCols - 1 ){
        myTsv += myTable.get(i, parseInt( colIdArray[j] ) ) + "\t";
      }else{
        myTsv += myTable.get(i, parseInt( colIdArray[j] ) ) + "\n";
      }
    }
  }

  myTsv = myTsv.replace( /,/g, "" );
  myTsv = myTsv.replace( /\t/g, "," );

  emailService.begin()
    .addTo( toAddress, toName )
    .setFrom( fromAddress, fromName )
    .setReplyTo( replyToAddress, replyToName )
    .setSubject( subject )
    .setBody( myBody )
    .addAttachment( myFileName, 'text/comma-separated-values; charset=Shift_JIS', myTsv)
    .send();
}