jquery 自動過濾表單輸入框先後空格

1$(document).ready(function() {
 2            $('#searchform input').keyup(trimkeyup);
 3});
 4function trimkeyup(e) {
 5    lucene_objInput = $(this);
 6    if (e.keyCode != 38 && e.keyCode != 40 && e.keyCode != 13) {
 7        var im = $.trim(lucene_objInput.val());
 8        lucene_objInput.val(im); 
 9    }
10}

1        <form id="searchform" name="searchform" action="listPsInfo.action" method="post">
 2        <div id="sr" class="b1 mb10">
 3            <ul id="sr_bq">
 4                <li class="on">
 5                    <div>
 6                        查詢員工信息
 7                    </div>
 8                </li>
 9            </ul>
10            <select class="sa_w_tx" style="width: 100px;" id="selectType" name="psInfoDO.name">
11                  <option value="1" <s:if test="optionValue==1">selected="selected"</s:if>>工號</option>
12                  <option value="2" <s:if test="optionValue==2">selected="selected"</s:if>>旺旺(花名)</option>
13                  <option value="3" <s:if test="optionValue==3">selected="selected"</s:if>>真實姓名</option>
14                  <option value="4" <s:if test="optionValue==4">selected="selected"</s:if>>郵箱</option>
15            </select> 
16            <input type="text" class="sa_w_tx" style="width: 180px;" id="textValue" name="psInfoDO.value" value="<s:property value="psInfoDO.value"/>" maxlength="100" title="請輸入相應內容  不容許空值" />&nbsp;&nbsp;
17             <input type="button" value="查詢" class="btn1" id="subform" onclick="dosearch();"/>&nbsp;&nbsp; <div id="errortip"></div>