셀렉트에서 채인징시 여러개 tr 을 보여줬다 숨겼다해야하는데요 tr 위로 div 감싸면 안되잔아요 어떻게 해야할까요 급~~

<div id='mode' style='display:none'>
<tr>
<td class=write_head>진행상태</td>
<td><select name="wr_1" id="forsale" itemname="진행상태" required>
<option value="접수" <?=($write[wr_1] == "접수")?"selected":"";?>>접수</option>
<option value="진행중" <?=($write[wr_1] == "진행중")?"selected":"";?>>진행중</option>
<option value="보류" <?=($write[wr_1] == "보류")?"selected":"";?>>보류</option>
<option value="완료" <?=($write[wr_1] == "완료")?"selected":"";?>>완료</option>
<option value="패스" <?=($write[wr_1] == "패스")?"selected":"";?>>패스</option>
<option value="공지" <?=($write[wr_1] == "공지")?"selected":"";?>>공지</option>
</select></td></tr>
<tr><td colspan=2 height=1 bgcolor=#e7e7e7></td></tr>

<tr>
<td class=write_head>구분</td>
<td><select name="wr_2" id="forsale" itemname="구분" required>
<option value="신규" <?=($write[wr_2] == "신규")?"selected":"";?>>신규</option>
<option value="유지보수" <?=($write[wr_2] == "유지보수")?"selected":"";?>>유지보수</option>
<option value="오류수정" <?=($write[wr_2] == "오류수정")?"selected":"";?>>오류수정</option>
</select></td></tr>
<tr><td colspan=2 height=1 bgcolor=#e7e7e7></td></tr>


>>>> 위 여러개 tr 태그를 숨겼다 보여줬다 해야하는데요

셀렉트 채인지시 숨겼다 보였다 하려면 어떻게 해야할까요~~ 급~~ 돠우주세요