查看文本框或者下拉列表的数据是否变化

文本框是当用户修改完后，失去焦点以后去判断文本框也是这个不知道怎么去判断
我的框架是struts2.修改完后要实现无刷新页面的诗句一些变化不用去数据库中再去读取
  <tr>
    <th class="x-html-cellC">조립</th>
    <th class="x-html-cell_tdC">&nbsp;<s:textfieldvalue="pilotProdManHour1.sumMH" /></th>
    <th class="x-html-cell_tdC">&nbsp;<s:property value="pilotProdManHour1.prod_mh" /></th>
    <th class="x-html-cell_tdC">&nbsp;<s:property value="pilotProdManHour1.lst_mh" /></th>
    <th class="x-html-cell_tdC">&nbsp;<s:property value="pilotProdManHour1.lnst_mh" /></th>
    <th class="x-html-cell_tdC">&nbsp;<s:property value="pilotProdManHour1.nprod_mh" /></th>
        <th class="x-html-cell_tdC">&nbsp;<s:property value="pilotProdManHour1.indrct_mh" /></th>
  </tr>