window.onload = function()
{
  var spread =
  new GC.Spread.Sheets.Workbook(document.getElementById("ss"),{sheetCount:3});
  var activeSheet = spread.getActiveSheet();
  // Set the backcolor and forecolor of a cell.
  var cell = activeSheet.getCell(1, 1, GC.Spread.Sheets.SheetArea.viewport);
  cell.backColor("Blue");
  cell.foreColor("Red");
  cell.value("Color");
}