自定义设置日期时间倒计时代码

function test(){
			// 当前时间
			var nowTime = new Date().getTime();
			// 2016/12/22 hh:mm:ee
			// 结束时间
			var endTime = new Date(document.getElementById('edtime').value);
			// 相差的时间	
			var t = endTime.getTime() - nowTime;

			if(t<=0){
				alert('请重新输入');
				 return false;
			}

			var d = Math.floor(t/1000/60/60/24);
			
			var h = Math.floor(t/1000/60/60%24);
			var i = Math.floor(t/1000/60%60);
			var s = Math.floor(t/1000%60);

			document.getElementById('d').innerHTML = d;
			document.getElementById('h').innerHTML = h;
			document.getElementById('i').innerHTML = i;
			document.getElementById('s').innerHTML = s;

			setTimeout(test, 1000);
		}