$(document).ready(function ()
{
    var spread =
    new GC.Spread.Sheets.Workbook(document.getElementById("ss"),
    {sheetCount:3});
    var activeSheet = spread.getActiveSheet();
    activeSheet.setValue(0, 0, "North");
    activeSheet.setValue(1, 0, "South");
    activeSheet.setValue(2, 0, "East");
    activeSheet.setValue(3, 0, "South");
    activeSheet.setValue(4, 0, "North");
    activeSheet.setValue(5, 0, "North");
    activeSheet.setValue(6, 0, "West");
    activeSheet.setColumnWidth(0, 80);
   
    // Set a rowFilter.
    activeSheet.rowFilter(new GC.Spread.Sheets.Filter.HideRowFilter
    (new GC.Spread.Sheets.Range(0, 0, 7, 1)));
    
    $("#button1").click(function()
     {
          var rowFilter = spread.getActiveSheet().rowFilter();
          if(rowFilter.isFiltered(0))
        {
            console.log("Row-filtering executed for Column1");
        }
       else
        {
            console.log("Row-filtering not executed for Column1");
        }
    });
});