<script type="text/javascript" src="mootools.js"></script>
<script type="text/javascript">
    window.addEvent('domready', function(){
                  if ($('registerForm'))
                  {
                    $('registerForm').addEvent('submit', function(e) {
                        new Event(e).stop();
                        var log = $('log_res').empty().addClass('ajax-loading');
                        this.send({
                          update: log,
                          onComplete: function() {
                              log.removeClass('ajax-loading');
                          }
                        });
                    });
                  }
              });
              
</script>

[HTML] pobierz, plaintext 
<form method='post' id='registerForm' action='upload.php'>
<div>
<p><input type="file" name="userfile-1" /></p><input type="text" name="userfile-1" />
</div>
<div style="text-align: center; padding: 8px;"><input type="submit" value="Zarejestruj się" class="submit" name="submit"></div>
</form>
[HTML] pobierz, plaintext