$(document).ready(function () {
     var spread = new GC.Spread.Sheets.Workbook(document.getElementById("ss"),{sheetCount:3});
     var sheet = spread.getActiveSheet();
     // 行数および列数を3に設定します。
    sheet.setRowCount(3, GC.Spread.Sheets.SheetArea.viewport);
     sheet.setColumnCount(3, GC.Spread.Sheets.SheetArea.viewport);
 });