anchor.diff:          <a href="http://www.treasure-data.com/" id="brand_signup">Treasure Data</a>
         </h1>
         <div id="form_wrapper">
  -        <form method="POST" action="/auth/td/callback" id="SignUpForm" >
  +        <form method="POST" action="/auth/td/callback" id="LoginForm" >
               <div>
                 Email: 
                 <input class="text required" name="email" placeholder="Email" type="text" />
  
positive.code: <!DOCTYPE html>
  <html>
    <head>
      <title>Sign Up | Treasure Data</title>
  
      <!-- jQuery -->
      <script src="https://ajax.googleapis.com/ajax/libs/jquery/1.4.0/jquery.min.js"></script>
  
negative.code:     <!-- ready() -->
      <script>
        $(document).ready(function(){
          $('#LoginForm').validate({
            rules: {
              password: {
                minlength: 6,
  