php dropdown menu population

Question

I\'m trying to write a php script that will populate a second drop down menu based on the selection of the a primary drop down menu. I would like to use jquery to do all the

Answer 1

Add one more line jQuery('#city').html('');
Now the code look like :

jQuery(document).ready(function() {

    jQuery('#state').change(function() {

          jQuery('#city').html('');   
          jQuery.post(
                'some-url.php',
                {
                        'state':jQuery('#state').val()
                },
                function(data, textStatus) {
                        jQuery.each(data, function(index, value) {
                                jQuery('#city').append('' + value + '');
                        });
                },
                'json'
        );
    });

});