js 默认选中分页条件项

 <table border="0" cellspacing="0" cellpadding="0" height="100%" align="left">
                                 <tr valign=bottom>
                                     <td></td>
                                     <td><select id="viewType" name="viewType">
                                             <option value="0">全部主题</option>
                                             <option value="1">全部精华贴</option>
                                             <!--
                                             <option value="2">当天的主题</option>
                                             <option value="3">本周的主题</option>
                                             <option value="4">本月的主题</option>
                                             -->
                                         </select>
                                         <select id="orderBy" name="orderBy">
                                             <option value="0">默认排序（按最后更新时间排序，但所有置顶帖都在前面）</option>
                                             <option value="1">按最后更新时间排序</option>
                                             <option value="2">按主题发表时间排序</option>
                                             <option value="3">按回复数量排序</option>
                                         </select>
                                         <select id="asc" name="asc">
                                             <option value="true">降序</option>
                                             <option value="false">升序</option>
                                         </select>
                                         <script type="text/javascript">
                                         $("#viewType").val('${viewType }');
                                         $("#orderBy").val('${orderBy }');
                                         $("#asc").val('${asc }');
                                     </script>
                                         <input type="IMAGE" src="${pageContext.request.contextPath}/style/blue/images/button/submit.PNG" align="ABSMIDDLE"/>
                                     </td>
                                 </tr>
                             </table>