<select id="select1">
<optgroup label="参数1">
<option value="1">aaa</option>
<option value="2">bbb</option>
<option value="3">ccc</option>
<option value="4">ddd</option>
</optgroup>
<optgroup label="参数2">
<option value="11">aaaa</option>
<option value="22">bbbb</option>
<option value="33">cccc</option>
<option value="44">dddd</option>
</optgroup>
<optgroup label="参数3">
<option value="111">aaaaa</option>
<option value="222">bbbbb</option>
<option value="333">ccccc</option>
<option value="444">ddddd</option>
</optgroup>
</select>
<optgroup label="参数1">
<option value="1">aaa</option>
<option value="2">bbb</option>
<option value="3">ccc</option>
<option value="4">ddd</option>
</optgroup>
<optgroup label="参数2">
<option value="11">aaaa</option>
<option value="22">bbbb</option>
<option value="33">cccc</option>
<option value="44">dddd</option>
</optgroup>
<optgroup label="参数3">
<option value="111">aaaaa</option>
<option value="222">bbbbb</option>
<option value="333">ccccc</option>
<option value="444">ddddd</option>
</optgroup>
</select>
解决方案 »
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