라디오값에 따른 내용보여주기

<tr>
            <th scope="row"><label for="wr_7">좋아하는 과일</label></th>
            <td class="wr_7"> 
                <select name='wr_7' id='wr_7' >
                    <option value="">선택하세요.</option>
                    <option value="수박" <?php echo ($write['wr_7'] == "수박") ? "selected" : "";?>>수박</option>
                    <option value="사과" <?php echo ($write['wr_7'] == "사과") ? "selected" : "";?>>사과</option>
                    <option value="딸기" <?php echo ($write['wr_7'] == "딸기") ? "selected" : "";?>>딸기</option>
                  </select>
           <? if ($w == '') { ?>     
          <br><input type="text" name="wr_10" value="<?=$write['wr_10']?>" id="wr_10" class="frm_input" maxlength="45" size="90" placeholder="좋아하는 이유는?" style="display:none;">
        <? } else {?>
          <br><input type="text" name="wr_10" value="<?=$write['wr_10']?>" id="wr_10" class="frm_input" maxlength="45" size="90" placeholder="좋아하는 이유는?">
        <? } ?>
            </td>
        </tr>
        <script>
        $("#wr_7").change(function(){
            if( $(this).val() == '딸기' ) {
                $("[name=wr_10]").show();
            }
            else{
                $("[name=wr_10]").hide();
            } 
        })
        $("#wr_7").trigger('change');
        </script>
        <tr>

<input type="radio" id=wr_7 name="wr_7" value="수박" <?php echo ($write['wr_7'] == "수박") ? "checked" : "";?> >수박 
                <input type="radio" id=wr_7 name="wr_7" value="사과" <?php echo ($write['wr_7'] == "사과") ? "checked" : "";?> >사과                     
                <input type="radio" id=wr_7 name="wr_7" value="딸기" <?php echo ($write['wr_7'] == "딸기") ? "checked" : "";?> >딸기