function Forum_validatePostThreadForm(oForm) {
    oForm.title.value = String(oForm.title.value).replace(/^\s*|\s*$/g,'');
    if('' == oForm.title.value) {
      window.alert('Wpisz tytuł komentarza.');
      oForm.title.focus();
      return false;
    }
    oForm.content.value = String(oForm.content.value).replace(/^\s*|\s*$/g,'');
    if('' == oForm.content.value) {
      window.alert('Wpisz treść komentarza.');
      oForm.content.focus();
      return false;
    }
    oForm.author_www.value = String(oForm.author_www.value).replace(/^\s*|\s*$/g,'');
    oRx = new RegExp("^http:\\/\\/[\\s\\w\\/\\\\\\.\\,\\:\\;\\_\\-\\%\\#\\?\\+\\=\\&\\@\\~]+$");
    if('' != oForm.author_www.value && !oRx.test(oForm.author_www.value)) {
      window.alert('Wpisz poprawny adres WWW (z "http://" na początku).');
      oForm.author_www.focus();
      return false;
    }    
    oForm.author_name.value = String(oForm.author_name.value).replace(/^\s*|\s*$/g,'');
    if('' == oForm.author_name.value) {
      window.alert('Podaj autora komentarza.');
      oForm.author_name.focus();
      return false;
    }    
    return true;
  }