前提引入jquery.js
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$(document).ready(function() {
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$('#searchform input').keyup(trimkeyup);
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});
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function trimkeyup(e) {
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lucene_objInput = $(this);
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if (e.keyCode != 38 && e.keyCode != 40 && e.keyCode != 13) {
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var im = $.trim(lucene_objInput.val());
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lucene_objInput.val(im);
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}
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}

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<form id="searchform" name="searchform" action="listPsInfo.action" method="post">
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<div id="sr" class="b1 mb10">
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<ul id="sr_bq">
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<li class="on">
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<div>
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查詢員工信息
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</div>
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</li>
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</ul>
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<select class="sa_w_tx" style="width: 100px;" id="selectType" name="psInfoDO.name">
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<option value="1" <s:if test="optionValue==1">selected="selected"</s:if>>工號</option>
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<option value="2" <s:if test="optionValue==2">selected="selected"</s:if>>旺旺(花名)</option>
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<option value="3" <s:if test="optionValue==3">selected="selected"</s:if>>真實姓名</option>
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<option value="4" <s:if test="optionValue==4">selected="selected"</s:if>>郵箱</option>
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</select>
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<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 不允許空值" />
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<input type="button" value="查詢" class="btn1" id="subform" onclick="dosearch();"/> <div id="errortip"></div>
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</form>

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頁面中所有的input輸入框都會自動過濾前后空格