$(function () {            var date = new Date();            var year = date.getYear();            var month = date.getMonth();            var riqi = date.getDay();            var hour = date.getHours();            var minutes = date.getMinutes();            var second = date.getSeconds();            if(second <10){              second = "0" + second;          }            var shijian = year + "年" + " " + month + "月" + " " + riqi + "月" + " " + hour + ":" + " " + minutes + ":" + " " + second;            var p1 = document.getElementById("p1");            p1.innerText = shijian;        }); setInterval("","1000")  我想設置個定時器。調用上面的匿名函數， 不知道這個定時器里面怎么寫、