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

     // セルの背景色と前景色を設定します。
    var cell = activeSheet.getCell(1, 1, GC.Spread.Sheets.SheetArea.viewport);
     cell.backColor("Blue");
     cell.foreColor("Red");
     cell.value("Color");
                      }