$(document).ready(function () 
{
    var spread = new GC.Spread.Sheets.Workbook(document.getElementById("ss"),
    {sheetCount:3});
    var sheet = spread.getActiveSheet();
    
    // Set the number of rows and columns to 3.
    sheet.setRowCount(3, GC.Spread.Sheets.SheetArea.viewport);
    sheet.setColumnCount(3, GC.Spread.Sheets.SheetArea.viewport);
});