Home

var defined = { nowTime: 0 , endTime : 0 , update : function( ){} , finish : function(){} } , _opts = $.extend({}, defined, opt ) , offsetTime = 0 //增长 , timeOut = setInterval(function(){ var info = getTime(); _opts.update( info.day, info.hour, info.minute, info.second ); if( info.day == 0 && info.hour == 0 && info.minute == 0 && info.second == 0 ){ //完成 _opts.finish( _opts); clearInterval( timeOut ); } offsetTime += 1e3; }, 1000) ;

		function getTime(){
			var cs, cm, ch, cd
				, offset = parseFloat( offsetTime ) || 0
				, cris = new Date( _opts.endTime ).getTime()//这里定义的是需要倒计时的时间，并转换成时间戳
				, now = new Date( _opts.nowTime ).getTime()//获取当前时间，并转换成时间戳
				, cTotal = cris - now - offset
				, as = 1000//时间戳以毫秒为单位，所以1秒为1000毫秒，以下分别定义1分钟，1小时和1天
				, am = as * 60
				, ah = am * 60
				, ad = ah * 24
				;
			//获取倒计时的天数，小时数，分钟数和秒数
			cd = Math.floor(cTotal / ad);
			ch = Math.floor((cTotal - cd * ad) / ah);
			cm = Math.floor((cTotal - cd * ad - ch * ah) / am);
			cs = Math.floor((cTotal - cd * ad - ch * ah - cm * am) / as);
			// cd + "天" + ch + "小时" + cm + "分" + cs + "秒";
			var out = {
				day : cd
				, hour : ch
				, minute : cm
				, second : cs
			};
			return out;
		}