해당 셀렉트의 옵션이 선택될때 주소1 혹은 주소2가 보이게 할려고 하는데요.
아래와 같이 한게 잘못 되었나요?

스크립트는 호출되었을때 아래의exp_1 or 2 가 none이라면 그 none을 없애게 하는거구요.


        <tr>
        <td>직위:</td>
        <td><select name="mJob" size="1">
                <option value="not">선택</option>
                <option value="교수" onSelect=javascript:viewAddr('exp_1');>교수</option>
                <option value="연구원" onSelect=javascript:viewAddr('exp_1');>연구원</option>
                <option value="조교" onSelect=javascript:viewAddr('exp_1');>조교</option>
                <option value="직원" onSelect=javascript:viewAddr('exp_1');>직원</option>
                <option value="학생" onSelect=javascript:viewAddr('exp_2');>학생</option>
                <option value="기타" onSelect=javascript:viewAddr('exp_2');>기타</option>
                </select>
        </td>
        </tr>

        <tr id =exp_1 style="display:none;">
        <td>주소:</td>
        <td>
        <input type="text" name="mAddrPost1" size="3"> - <input type="text" name="mAddrPost2" size="3">
        <input type="text" name="mAddrPost2" size="26"><input type="button" onClick="javascript:SearchZip();" value="주소찾기"><br>
        <input type="text" name="mAddrPost3" size="38">
        </td>
        </tr>

        <tr id =exp_2 style="display:none;">
        <td>주소:</td>
        <td>
        <input type="text" name="mAddr1" size="3"> - <input type="text" name="mAddrPost2" size="3">
        <input type="text" name="mAddr2" size="26"><input type="button" onClick="javascript:SearchZip();" value="주소찾기"><br>
        <input type="text" name="mAddr3" size="38">
        </td>
        </tr>