window.onload = function(){
        var spread = new GC.Spread.Sheets.Workbook(document.getElementById("ss"),{sheetCount:3});
        var sheet = spread.getActiveSheet();
 var sheet = spread.getActiveSheet();
     // 行数を3に設定します。                 
sheet.setRowCount(3, GC.Spread.Sheets.SheetArea.viewport);
 sheet.setValue(0, 0, "Row 1", GC.Spread.Sheets.SheetArea.viewport);
 sheet.setValue(1, 0, "Row 2", GC.Spread.Sheets.SheetArea.viewport);
 sheet.setValue(2, 0, "Row 3", GC.Spread.Sheets.SheetArea.viewport);
 sheet.setColumnWidth(0, 90.0, GC.Spread.Sheets.SheetArea.viewport);
$("#button1").click(function(){
        // 行2の後に1行追加します             
  sheet.addRows(1, 1);
     sheet.setValue(1, 0, "Added row");
 });
$("#button2").click(function(){
        // 行2の後に1行追加します
                         sheet.addColumns(1, 1);
     sheet.setValue(0, 1, "Added column");
 });
 }