<!DOCTYPE html>
<html>
  <head>
    <script src="http://code.jquery.com/jquery-1.11.0.min.js"></script>
    <script src="http://cdn.opalrb.org/opal/0.6.3/opal.min.js"></script>
  </head>
  <body>
    <script src="mario.js"></script>
  </body>
</html>
<!DOCTYPE html>
<html>
  <head>
    <script src="http://code.jquery.com/jquery-1.11.0.min.js"></script>
  </head>
  <body>
    <script src="mario.js"></script>
  </body>
</html>

Remove unnecessary opal script source
Remove unnecessary opal script source

the opal declaration in html causes side effects calling opal twice
