anchor.diff:                          用户名：
                       </td>
                       <td>
  -                        <input id="x" class="easyui-validatebox input" required="true" validtype="length[1,15]"
  +                        <input id="x" class="easyui-validatebox input" required="true" validtype="length[3,20]"
                               style="width: 150px;" datatype="string" nullable="no" maxsize="20" chname="用户名" value="root" />
                       </td>
                   </tr>
  
positive.code: <head id="Head1">
  <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
  <title>GLAF基础应用框架-系统登录</title>
  <link href="${contextPath}/css/system.css" type="text/css" rel="stylesheet">
  <link href="${contextPath}/css/site.css" rel="stylesheet" type="text/css">
  <link href="${contextPath}/icons/styles.css" rel="stylesheet" type="text/css" />
  <link href="${contextPath}/scripts/easyui/themes/gray/easyui.css" rel="stylesheet" type="text/css" />
  <script type="text/javascript" src="${contextPath}/scripts/jquery.min.js"></script>
  <script type="text/javascript" src="${contextPath}/scripts/verify.js" ></script>
  <script type="text/javascript" src="${contextPath}/scripts/easyui/jquery.easyui.min.js"></script>
  <script type="text/javascript" src="${contextPath}/scripts/easyui/locale/easyui-lang-zh_CN.js"></script>
  <script type="text/javascript">
      var login='${requestContext.login}';
  
      function openMainPage(){
  		var browser=navigator.appName
  
negative.code:                     </td>
                      <td>
                          <input type="password" id="y" style="width: 150px;" class="easyui-validatebox input"
                              required="true" validtype="length[6,20]" datatype="string" nullable="no" maxsize="20" chname="密码" value="111111"/>
                      </td>
                  </tr>
              </table>
  