'clean up any previous data if present
        'start with the checkboxes
        Dim tblControl As HtmlTable = CType(checkBoxes.Controls(0), HtmlTable)
        For Each control As System.Web.UI.Control In tblControl.Controls
            If (TypeOf control Is System.Web.UI.HtmlControls.HtmlTableRow) Then
                For Each rowControl As System.Web.UI.Control In control.Controls
                    If (TypeOf rowControl Is System.Web.UI.HtmlControls.HtmlTableCell) Then
                        For Each cellControl As System.Web.UI.Control In rowControl.Controls
                            If (TypeOf cellControl Is System.Web.UI.WebControls.CheckBox) Then
                                Dim chkBox As System.Web.UI.WebControls.CheckBox = CType(cellControl, System.Web.UI.WebControls.CheckBox)
                                chkBox.Checked = False
                            End If
                        Next
                    End If
                Next
            End If
        Next