select 与此同时传送两个值

? <form action="" method="get">
??
???? <input type=text name=id value="">
???? <input type=text name=code value="">

????? ?

????? <select onchange="this.form.id.value=this.value;
??????????this.form.code.value=this.options[this.selectedIndex].text;">
???????? ?

???????? <option value="123">aaa</option>
???????? ?<option value="456">bbb</option>
???????? ?<option value="789">ccc</option>

????? </select>
?
</form>