To test two-level country/cities selection first choose a country, then the cities list of this country will be loaded. Such an approach will save the traffic when only needed list of cities is loaded. Lists of countries/cities can be fully customized. Two-level fields selection can be used for other ads fields, e.g. first a maker can be chosen, then the models of this maker in other menu will be loaded. To test search features with two-level selection of countries/cities click here, then click link 'search'.