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);