用jquery和ajax根据州改变城市

Question

I want to know difference between $.ajax and $.post in jquery. I search it but not getting clearification. Actually I am having drop down of states and cities and I am changing cities when states changes with jquery $.post. Here is my code of jquery

$.post('includes/change_cities.php', { 'state_id': state_id },
        function( data ) {
        var content = $( data );
        $( "#cities" ).empty().append( content );
        }
        );

My Problem is when states changes for the first time it takes too much time to change cities about 4 to 5 seconds but after first time it becomes normal means changes cities without taking any time. So Is there any problem in my code or should I use any other method for this.

-Thanks

Answer 1

The performance Depends on your code and sql implementation.
$.post is subset of $.ajax in tersm of functionality.

$.ajax({
type: 'POST',
url: 'ajax/test.html',
data: data,
success: function(data){
$('.result').html(data)
},
});

is Equivalent to

$.post('ajax/test.html', function(data) {
$('.result').html(data);
});