체크박스 값 가져가는 방법 도움부탁드립니다..

<th><label for="delivery_vdr">업체</label></th>
                <td> <?php  $sql_serchVendor = " select '' as  vdr_cd,
                                               '전체' as  vdr_nm
                                            from dual
                                            union all
                                           select vdr_cd, 
                                                  vdr_nm
                                             from g5_vendor
                                             where 1=1";
                    $result_serchVendor = sql_query($sql_serchVendor);  ?>
                        <select name="delivery_vdr" id="delivery_vdr" >
                           <?php
                              for ($k=0; $row_serchVendor=sql_fetch_array($result_serchVendor); $k++)
                              { ?>
                        <option value="<?php echo $row_serchVendor['vdr_cd']?>" <?php echo get_selected($delivery_vdr,$row_serchVendor['vdr_cd']); ?>><?php echo $row_serchVendor['vdr_nm'] ?></option>
                           <?php } ?>
                        </select></td>