我需要帮助提交具有相同值的多个下拉列表的表单,
条件:如果email
未选择警报电子邮件需要选择否则检查已选择的值
<form method="post" action="record_save.php">
<div id="student_records">
<select name="select1">
<option value="0">None</option>
<option value="1">email</option>
<option value="2">firstname</option>
<option value="3">lastname</option>
</select>
<select name="select2">
<option value="0">None</option>
<option value="1">email</option>
<option value="2">firstname</option>
<option value="3">lastname</option>
</select>
<select name="select3">
<option value="0">None</option>
<option value="1">email</option>
<option value="2">firstname</option>
<option value="3">lastname</option>
</select>
<!-- until -->
<select name="select10">
<option value="0">None</option>
<option value="1">email</option>
<option value="2">firstname</option>
<option value="3">lastname</option>
</select>
<input type='submit' name='submit'>
</div>
</form>