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);
                                }