anchor.diff:        <a href="/Educa2016Materiales.pdf" download class="btn btn-primary">Materiales</a>
       <% end %>
       <% unless showMaterials %>
  -      <div class="form_box">
  +      <div class="form_box" style="display:none">
           <form id="educa2016materialsform" action="/contest/educa2016/educa2016materials" method="post">
             <div class="form-group">
               <input class="form-control" type="text" name="user_name" id="name" placeholder="Nombre" value="<%=user_signed_in? ? current_subject.name : ""%>">
  
positive.code:       },
        dataType: "json"
      });
  
    });
  <%end%>
  
negative.code:         $("#educa2016materialsform").find("input[type='submit']").hide();
          $("#educa2016materialsform").find("a[href='/Educa2016Materiales.pdf']").show();
          $("a[href='/Educa2016Materiales.pdf']")[0].click();
          if (window.localStorage) {
            localStorage.setItem("educa2016maillist", "subscribed");
          }
        },
        error: function(data){
          if(typeof data.responseText == "string"){
  