function shout()
  { 
    var url = '/shoutbox/addshout';
    var shout_text = encodeURIComponent($F('shout_text'));
    var myAjax3 = new Ajax.Updater(
      'shoutbox_body', 
      url, 
      { 
        method: 'post',
        parameters: 'shout_text=' + shout_text,
        evalScripts: true,
        onFailure: reportError,
        onLoading: function(req) {
                  $('send_shout').disabled='disabled';  
          },
          onComplete: function(req) {
            $('send_shout').disabled=false;
            $('shout_text').value ='';
            document.getElementById('shoutbox_body').scrollTop=document.getElementById('shoutbox_body').scrollHeight-document.getElementById('shoutbox_body').clientHeight;
          } 
        
      }); 
    
  function reportError(request)
  {
    alert('Wystąpił błąd shutboxa.');
  }
      
    
  }