$(function(){
  $('#locations select').live('change', function(){
    $('~ select', this).remove()
    var params = {id:$(this).val()};
    if (typeof(default_location_text) != 'undefined'){
      params.default_text = default_location_text;
    }
    $.get('/location/get_children', params, function(data){handle_dropdown_return(data)});
  }); 
});

function handle_dropdown_return(data){
  $('#locations').append(data);
}