anchor.diff:    <body>
       <main>
         <div class="header">
  -        <img src="http://www.gravatar.com/avatar/blah.jpg?d=blank" id="userAvatar" class="avatar">
  +        <img src="//www.gravatar.com/avatar/blah.jpg?d=blank" id="userAvatar" class="avatar">
           <img src="/arrow.png" class="arrow">
  -        <img src="http://www.gravatar.com/avatar/<%= admin_hash %>.jpg?s=120" class="avatar">
  +        <img src="//www.gravatar.com/avatar/<%= admin_hash %>.jpg?s=120" class="avatar">
         </div>
         <form action="/charge" method="POST">
           <label class="form-item">
  
positive.code:         checkFormReady();
  
          var updateGravatar = function() {
            $("#userAvatar").attr("src","http://www.gravatar.com/avatar/" + md5($("#email").val()) + ".jpg?s=120&d=blank");
          }
          $('#email').on('change input', updateGravatar);
          updateGravatar();
  
negative.code: 
          var handler = StripeCheckout.configure({
            key: '<%= ENV["STRIPE_API_PUBLIC_KEY"] %>',
            image: '//www.gravatar.com/avatar/<%= admin_hash %>.jpg?s=120',
            token: function(token) {
              updateButton('sending');
              setEnabled($('input, form'), false);
  