var oDate = new Date();//			console.log(oDate);//			console.log(oDate.getFullYear());//年份//			console.log(oDate.getMonth());//月份  0-11//			console.log(oDate.getDate());//日期//			console.log(oDate.getDay());//星期 0-6 0周日//			console.log(oDate.getHours());//小时//			console.log(oDate.getMinutes());//分钟//			console.log(oDate.getSeconds());//秒//			console.log(oDate.getTime());//1970年1月1日到现在的毫秒数			//			oDate.setFullYear(2020);//			console.log(oDate.getFullYear());

　　

小例子，淘宝倒计时

		时				分				秒

　　

//			淘宝倒计时			var oSpan = document.getElementsByTagName("span");			var endDate = new Date("2016/2/17,12:00:00");			var endTime = endDate.getTime();			var time = setInterval(function(){				var nowDate = new Date();				var nowTime = nowDate.getTime();				var timeLeft = endTime - nowTime;//				console.log(timeLeft);				var nowHour = Math.floor(timeLeft/(1000*60*60));				var hourLeft = timeLeft%(1000*60*60);				var nowMinute = Math.floor(hourLeft/(1000*60));				var minuteLeft = hourLeft%(1000*60);				var nowSecond = Math.floor(minuteLeft/1000);								oSpan[0].innerHTML = nowHour;				oSpan[1].innerHTML = nowMinute;				oSpan[2].innerHTML = nowSecond;				if(timeLeft<=0){					clearInterval(time);					oSpan[0].innerHTML = 0;					oSpan[1].innerHTML = 0;					oSpan[2].innerHTML = 0;				}			},500)