option选中设置

Question

 我option是jquery动态生成的 如何让我选择的option具有selected属性$("#Province").change(function () {
                var select = $("#Province").val();
                $("#CitySelect").get(0).options.length = 0;
                $.getJSON("/Job/Pro2City", { 'Province': select }, function (data) {
                    $.each(data, function (i, item) {
                        //$("<option></option>").val(item["ID"]).text(item["Name"]).appendTo($("#cmb2"));
                        $("#CitySelect").append("<option value=" + item["Id"] + ">" + item["Name"] + "</option>");
                        //$("#CitySelect").children('option').attr('selected', 'selected');
                    });
                    var sal = $("#CitySelect").find("option");
                    sal.click(function () {
                        $(this).blur().attr('selected', 'selected');
                    });
                    if ($("#CitySelect").children('option').attr('selected') != undefined) {
                        $("#City").val($("#CitySelect").children('option').val());
                    }
                });
            })