$(document).ready(function () 
{
    var spread = 
    new GC.Spread.Sheets.Workbook(document.getElementById("ss"),{sheetCount:3});
    var sheet = spread.getActiveSheet();
    // Set the desired string in headers
    sheet.setValue(0, 1, "Column Header", GC.Spread.Sheets.SheetArea.colHeader);
    sheet.setValue(1, 0, "Row Header", GC.Spread.Sheets.SheetArea.rowHeader);
    sheet.setColumnWidth(1, 120.0,GC.Spread.Sheets.SheetArea.colHeader);
    sheet.setColumnWidth(0, 90.0,GC.Spread.Sheets.SheetArea.rowHeader);
});