function switchFilters(_link, _form)
{
  $$('#formmenu a').each(function(link){link.className = 'fm_btn';});
  _link.className = 'fm_btn_active';

  $$('#filters form').each(function(form){form.setStyle('display', 'none');});
  $(_form).setStyle('display', 'block');

  return false;
}