anchor.diff:    </table>
   
   </div> <!-- pageContent -->
  +<script>
  +  $(document).ready(function() {
  +    $(".file-upload").submit(function(e) {
  +      if (this.file.value === "") {
  +        alert("Please provide a file.");
  +        this.file.focus();
  +        e.preventDefault();
  +      }
  +    });
  +  });
  +</script>
  
positive.code: <% content_for :head do -%>
  <script type="text/javascript">
    var popHealth = popHealth || {};
  
  
    $(document).ready(function() {
    });
  
  </script>
  <% end -%>
  
  <div id="pageContent" style="padding:20px;">
  <h3>Patients</h3>
  
  
negative.code:     <tr><td colspan="2">&nbsp;</td></tr>
  
      <tr><td colspan="2">&nbsp;</td></tr>
      <%= form_tag("/admin/upload_patients", :method => "put", :multipart=>true, :class=>"file-upload") do %>
      <tr><td>Upload patient zip file: </td>
        <td>
          <%= file_field_tag(:file)%>
        </td>
        <td><%= submit_tag("Upload", 'class' => "btn btn-success") %></td>
      </tr>
      <% end %>
  
      <tr><td colspan="2">&nbsp;</td></tr>
      <%= form_tag("/admin/upload_providers", :method => "put", :multipart=>true, :class=>"file-upload") do %>
      <tr><td>Upload provider opml file: </td>
        <td>
          <%= file_field_tag(:file)%>
  