<select name="d_exam_type" onChange="cc()">
<option value="a">a</option>
<option value="b">b</option>
</select>
<script>
function cc(){
lilun.value=d_exam_type.value;
}</script>
<option value="a">a</option>
<option value="b">b</option>
</select>
<script>
function cc(){
lilun.value=d_exam_type.value;
}</script>
<option value="a">a</option>
<option value="b">b</option>
</select>