var spread = 
new GC.Spread.Sheets.Workbook(document.getElementById('ss'), 
{ sheetCount: 1 });
sheet = spread.getSheet(0);

// Creating cell range using formulaToRanges() method
cellRanges = GC.Spread.Sheets.CalcEngine.formulaToRanges(sheet, 'B3:D5', 0, 0);

// Getting row/column indexes and rowCount/colCount of range in formula
console.log("Starting Row Index of cell range 'B3:D5' is " + cellRanges[0].ranges[0].row);
console.log("Starting Column Index of cell range 'B3:D5' is " + cellRanges[0].ranges[0].col);
console.log("RowCount of cell range 'B3:D5' is " + cellRanges[0].ranges[0].rowCount);
console.log("ColCount of cell range 'B3:D5' is " + cellRanges[0].ranges[0].colCount);