function clearSimpleFields()
{
  var simpleFieldIds = new Array(
    'ajanlat_filter_datum_tipus', 
    'ajanlat_filter_datum_kezdet_year', 
    'ajanlat_filter_datum_kezdet_day', 
    'ajanlat_filter_datum_kezdet_month', 
    'ajanlat_filter_datum_veg_year', 
    'ajanlat_filter_datum_veg_day', 
    'ajanlat_filter_datum_veg_month', 
    'ajanlat_filter_szabadszavas', 
    'ajanlat_filter_statusz'
  );
  for (var i in simpleFieldIds)
  {
    document.getElementById(simpleFieldIds[i]).value = '';
    document.getElementById(simpleFieldIds[i]).selectedIndex = -1;
  }
}

function clearEloredefinialt()
{
  var eloreDefinialtFieldIds = new Array(
    'ajanlat_filter_eloredefinialt'
  );
  for (var i in eloreDefinialtFieldIds)
  {
    document.getElementById(eloreDefinialtFieldIds[i]).selectedIndex = -1;
  }
}