public void OnCheckedChangedMayor(object sender, EventArgs e)
    {
        string       sQuery  = "1=1";
        CheckBoxList chkList = ((CheckBoxList)sender);

        if (chkList.Items.Count > 0 && (!chkList.Items[0].Selected))
        {
            foreach (ListItem x in ((CheckBoxList)sender).Items)
            {
                if ((x.Selected) && (!x.Value.Equals("0")))
                {
                    if (sQuery.Equals("1=1"))
                    {
                        sQuery = " strMarketingAirline='" + x.Value.ToString() + "'";
                    }
                    else
                    {
                        sQuery += " OR strMarketingAirline='" + x.Value.ToString() + "'";
                    }
                }
            }
        }
        else
        {
            foreach (ListItem x in ((CheckBoxList)sender).Items)
            {
                x.Selected = false;
                sQuery     = "1=1";
            }
        }

        CsVuelos.setOtrosFiltrosAerolineaBFM(this.Parent, sQuery, this);
    }
    protected void FilteHeaderAir_Command(object sender, CommandEventArgs e)
    {
        string sQuery = "strMarketingAirline='" + e.CommandArgument.ToString() + "'";

        cRefere.setOtrosFiltrosAerolineaBFM(this.Parent, sQuery, this);
    }