var oldSelect;
var oldSelect2;
function changeCity(){
		if (oldSelect){
    oldSelect.style.display = 'none';
		oldSelect2.style.display = 'none';
		}
		var eSelect = document.all(CarSearch.CityAirportMain.value);
		var sSelect = document.all(CarSearch.CityAirportMain.value + '-2');
		if (sSelect){
		sSelect.selectedIndex = 0;
		sSelect.style.display = '';
		oldSelect2 = sSelect;
		}
		if (eSelect){
		eSelect.selectedIndex = 0;
		eSelect.style.display = '';
		oldSelect = eSelect;
		}
}