window.onload = function()
{
   var spread = 
   new GC.Spread.Sheets.Workbook(document.getElementById("ss"),{sheetCount:3});
   var activeSheet = spread.getActiveSheet();

   // Deactivate automatic column generation while binding.
   activeSheet.autoGenerateColumns = false;

   // Create a data table manually.
   var sampleTable = 
   [
    {"ID":10, "Text":"Text-10", "Check":true},
    {"ID":20, "Text":"Text-20", "Check":false},
    {"ID":30, "Text":"Text-30", "Check":false},
    {"ID":40, "Text":"Text-40", "Check":true},
    {"ID":50, "Text":"Text-50", "Check":true}
   ];

   // Bind the data table
   activeSheet.setDataSource(sampleTable);

   // Bind only specific fields.
   activeSheet.bindColumn(0, "Check");
   activeSheet.bindColumn(1, "ID");
   activeSheet.setColumnCount(2);
}