js 动态加载select触发事件

动态加载select后，手动调用一下 subjectChange函数，模拟触发change事件

        function hallidChange(value) {
            $.ajax({
                type: "post",
                url: "/Common/GetSessions",
                data: {
                    hallId: value, dateTime: $("#currentTime").val(), timeinterval: $("#timeinterval").val()
                },
                success: function (str) {
                    console.log(str);
                    var obj = str;
                    if (obj.code == "200") {
                        $("#sessionId").empty();
                        for (var key in obj.result) {
                            $("#sessionId").append("<option value = " + key + " > " + obj.result[key] + "</option > ");
                        }
                        subjectChange($("#sessionId").val());
                    }
                    else {
                        layer.msg(obj.message, { icon: 7, time: 1500 });
                    }
                },
                error: function () { layer.msg('发生错误，请联系客服！', { icon: 2, time: 1500 }); }
            });
        }