셀렉트박스 수정해도 그대로 남아있게

<select name="wr_1" id="selwr_1_1" onchange="get_div(this.value, 'g5s_MediumDiv', 'selwr_1_2')">   <option value="">AREA</option>   <?   $query = sql_query("SELECT * FROM g5s_BigDiv ORDER BY BigDivOrder ASC");   while($row = sql_fetch_array($query)) {    echo "<option value='".$row['BigDivNo']."'>".$row['BigDivName']."</option>";   }   ?>  </select>  <!-- g5s_MediumDiv, where BigDivNo='$write[wr_2]' -->  <select name="wr_2" id="selwr_1_2" onchange="get_div(this.value, 'g5s_Div', 'selwr_1_3')">   <option value="">HOTEL</option>  </select>  <!-- g5s_Div, where BigDivNo='$write[wr_3]' -->  <select name="wr_3" id="selwr_1_3">   <option value="">ROOM TYPE</option>  </select>​