JS计算当前时间距目标时间相差

//计算竟拍剩余时间
	function chickEndtime(){
		var endtime = document.getElementById("endtime").innerText;//获取结束时间
		//获得当前时间
	    var d = new Date();
	    var s = d.getYear()+ "-" + (d.getMonth() + 1) + "-" + d.getDate() + " " + d.getHours() + ":" + d.getMinutes() + ":" + d.getSeconds();
	   
       	var d1 = new Date(endtime.replace(/-/g, "/"));
		var d2 = new Date(s.replace(/-/g, "/"));
		if (Date.parse(d1) - Date.parse(d2) > 0) {
			//计算当前时间距结束时间多少秒
			var miao = (Date.parse(d1) - Date.parse(d2))/1000;
			//计算相差多少天
			var tian = parseInt(miao/86400);//获得天数
			var shi = parseInt(miao/3600-tian*24);//获得小时数
			var fen = parseInt(miao/60-(shi*60+tian*1440));//获得分钟数
			
			var timeed = tian+"天"+shi+"时"+fen+"分";
			document.getElementById("timeed").innerText = timeed;
		}else if (Date.parse(d1) - Date.parse(d2) <= 0) { 
			alert("该商品竟拍已结束!");
			window.location = "http://localhost:8080/NTWshop_JP/servlet/ServletUpdateApStatus?id=<%=request.getParameter("id") %>";
		}
	}