STRUTS2 验证框架问题 ！

我在页面上
 <form id="loginform" name="loginform" method="post" action="${pageContext.request.contextPath}/LoginBack.shtml">
                    <ul>
                        <li>
                            <label for="name">用户名：</label>
                            <input type="text" name="auInfo.logName" id="name" class="inbox"/>
                        </li>
                        <li class="pws">
                            <label for="name">密码：</label>
                            <input type="password" name="auInfo.logPwd" id="password"
                            class="inbox"/>
                        </li>
                        <li class="but"><input type="submit" name="button" id="button"  value="提交"/></li>
                        <li class="error">
                         <s:fielderror fieldName="auInfo.logName" id="errorname"></s:fielderror>
                         <s:fielderror fieldName="auInfo.logPwd" id="errorpws" ></s:fielderror>
                        </li>
                    </ul>
                </form>
提交之后    返回   Error 信息   ，   用户名密码。原输入的值还能保留么？
 请问怎么弄  谢谢了