protected void DDLModel_SelectedIndexChanged(object sender, EventArgs e)
        {
            GenericVehicle gv = new GenericVehicle();

            //Vehicle Year
            //Need to clear the combobox before adding new items
            DDLYear.Items.Clear();
            DDLYear.Items.Insert(0, "");
            foreach (string year in gv.SearchVehicleYear(DDLModel.Text))
            {
                DDLYear.Items.Add(year);
            }
        }
        protected void ModelDDL_SelectedIndexChanged(object sender, EventArgs e)
        {
            GenericVehicle gv = new GenericVehicle();

            //Vehicle Year
            //Need to clear the combobox before adding new items
            YearDDL.Items.Clear();
            YearDDL.Items.Insert(0, "");
            foreach (string year in gv.SearchVehicleYear(ModelDDL.Text))
            {
                YearDDL.Items.Add(year);
            }
            YearDDL.DataBind();
        }