[jQuery] Code not working on IE7 (Please Help)

[vipin]

Hi all,
This code is not working on IE7 but it working fine on firefox.
give me some advice





$.getJSON('LoadCities.ashx?StateID=' + StateID, function(cities) {

                        $.each(cities, function() {

                            //alert(this['City']);
                                             //alert(this['City']);
                           $
("#ctl00_ctl00_MiddleContent_InnerMiddle_ddlCities").append($
("<option></option>").val(this['ID']).html(this['City']));

                       });

                    });


thanks