SELECT-optgroup-label効果
1439 ワード
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<select name='Grade' class='s8'>
<option value=''>— —</option>
<optgroup label=' '></optgroup>
<option value='18'> </option>
<optgroup label=' '></optgroup>
<option value='5'> 1 </option>
<option value='6'> 2 </option>
<option value='7'> 3 </option>
<option value='8'> 4 </option>
<option value='9'> 5 </option>
<option value='10'> 6 </option>
<optgroup label=' '></optgroup>
<option value='11'> 7 </option>
<option value='12'> 8 </option>
<option value='13'> 9 </option>
<optgroup label=' '></optgroup>
<option value='14'> 10 </option>
<option value='15'> 11 </option>
<option value='16'> 12 </option>
</select>
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