$(document).ready(function () {
//Set the number of sheets to 3.
var spread = new GC.Spread.Sheets.Workbook(document.getElementById("ss"),{sheetCount:3});
$("#button1").click(function(){
// Create a new sheet and add it at 2nd position.
var sheet = new GC.Spread.Sheets.Worksheet();
sheet.name("The added sheet");
spread.addSheet(1, sheet);
});
});