I have here the code and flow of my project i have 3 select here one for continent one for country one for city i get data to populate these select from ajax request it is now working fine i just want to make a bit fancy so i want to have a few function

1.When Continent is select the list of country for that continent is listed in the country list when the change happens I want the city
to also show the cities of the first entry in the country currently
it does not happened what i do is i still need to change the entry
in country select to show the list of cities

2.Question is do i need to add another ajax request inside the ajax request for continent i am not sure this one is feasible i tried it,
it is not working for now

Ajax Code

$('.continentname').change(function() {

        var id = $(this).find(':selected')[0].id;

        //alert(id); 

        $.ajax({

            type:'POST',

            url:'../include/continent.php',

            data:{'id':id},

            success:function(data){

                // the next thing you want to do 

    var country= document.getElementById('country');

              $(country).empty();

    var city = document.getElementById('city');

              $(city).empty();

    for (var i = 0; i < data.length; i++) {

    $(country).append('<option id=' + data[i].sysid + ' value=' + data[i].name + '>' + data[i].name + '</option>');

    }

            }

        });



    });



$('.countryname').change(function() {

        var id = $(this).find(':selected')[0].id;

        $.ajax({

            type:'POST',

            url:'../include/country.php',

            data:{'id':id},

            success:function(data){

                // the next thing you want to do 

    var city = document.getElementById('city');

              $(city).empty();

    for (var i = 0; i < data.length; i++) {

    $(city).append('<option id=' + data[i].sysid + ' value=' + data[i].name + '>' + data[i].name + '</option>');

    }

            }

        });



    });

From database i put the value into the option select like

$(#continent).val(continentid);

$(#continent).change();

$(#country).change();

$(#country).val(countryid);

$(#city).val(cityid);