$(document).ready(function(){
	$('#subForm-region_id').change(function(event){
		$.getJSON('/add/cities/' + $(this).val(),{}, function(j){
	      var options = '';
	      for (var i = 0; i < j.length; i++) {
	        options += '<option value="' + j[i].city_id + '">' + j[i].city_name + '</option>';
	      }
	      $("select#subForm-city_id").html(options);
	    });
	});
});