window.onload = function () {     
var spread = new GcSpread.Sheets.Spread(document.getElementById("spreadContainer"),{sheetCount:3});
var activeSheet = spread.getActiveSheet();
    activeSheet.setRowCount(5);
    activeSheet.setColumnCount(2);

    activeSheet.getColumn(1)
        .backColor("lightYellow")
        .width(120);

    activeSheet.setValue(0, 0, 10);
    activeSheet.setValue(1, 0, 20);
    activeSheet.setValue(2, 0, 30);
    activeSheet.setValue(3, 0, 40);
    activeSheet.setValue(4, 0, 50);

    //Set SUM function (Sum of all parameter values).
    activeSheet.setFormula(0, 1, "SUM(A1:A5)");

    //Set PRODUCT function (Product of all parameter values).
    activeSheet.setFormula(1, 1, "PRODUCT(A1:A5)");

    //Set AVERAGE function (Average of all parameter values).
    activeSheet.setFormula(2, 1, "AVERAGE(A1:A5)");

    //Set the sum of cell(0,0) and cell(4,0).
    activeSheet.setFormula(3, 1, "A1 + A5");

    //Multiply cell(0,0) by 2 if the value in this cell is greater than 10, otherwise multiply it by 3.
    activeSheet.setFormula(4, 1, "IF(A1>10, A1*2, A1*3)");

        }