          citeDiv.innerHTML = biblioDiv.innerHTML;
            }
            popup.appendChild(citeDiv);
          });
          return popup.innerHTML;
        });
      }
    }
  });
  </script>
</div> <!-- /content -->
<footer class="footer">
  <div class="nav-footer">
    <div class="nav-footer-left">
<a href="http://drganghe.github.io">Gang He</a> ©
<script>document.write(new Date().getFullYear())</script>
</div>   
    <div class="nav-footer-center">
      &nbsp;
    </div>
    <div class="nav-footer