anchor.diff:      $(function () {
           $('#username').attr('placeholder', '用户名');
           $('#password').attr('placeholder', '密码');
  -        $('#j_captcha_response').attr('placeholder', 'Captcha');
  +        $('#captcha').attr('placeholder', '验证码');
           if (!$('#password').val()) {
               $('#password').focus();
           }
  
positive.code: <%@ taglib prefix="spring" uri="http://www.springframework.org/tags" %>
  <%@ taglib prefix="form" uri="http://www.springframework.org/tags/form" %>
  <%@ taglib prefix="fn" uri="http://java.sun.com/jsp/jstl/functions" %>
  <% boolean isMobile = ClientUtil.isMobileClient(request.getHeader("user-agent"));
      if (!isMobile) {
  %>
  <html>
  <head>
      <meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
  
negative.code: </script>
  </body>
  </html>
  
  
  