$(document).ready(function () {
            setInterval("startrequest()", 300 * 1000);//5分钟调用一次
        });

        function startrequest() {
            $.post("/Admin/OrderInfo/GetMessage", function (data) {
                //console.info(data);

                if (data.uroleid == 3)
                {
                    if (data.untreatedsum > 0 || data.abnormalsum > 0 || finishorder>0) {
                        alert("您好,您有：" + data.untreatedsum + " 条未处理的订单,和 "+data.abnormalsum+" 条异常订单,和"+data.finishorder+" 条回访订单,请及时处理！");
                    }
                }
                if (data.uroleid == 2)
                {
                    if (data.nopicksum > 0 || data.nosendsum > 0 || data.sendsum) {
                        alert("您好,您有：" + data.nopicksum + " 条未分配取件员的订单,和 " + data.nosendsum + " 条未分配送件员的订单,和 "+data.sendsum+" 条订单正在派送中,请及时处理！");
                    }
                }
            });
        }

js,jquery的一个简单按时间循环调用方法