window.onload = function()
{
  var spread = 
  new GC.Spread.Sheets.Workbook(document.getElementById("ss"),{sheetCount:3});
  var sheet = spread.getActiveSheet();

  // Allow users to enter mathematical formula.
  spread.options.allowUserEditFormula = true;
  activeSheet.setValue(0, 0, 1000);
  activeSheet.setValue(1, 0, 200);
}