Jquery之倒计时计算

 1 setInterval("setDate(‘2018-12-24 12:20:45‘)",1000); 2 ?3 function setDate(setTime){ 4 var date = new Date();//获取系统当前时间 5 var time = (date.getYear()+1900)+"-"+(date.getMonth()+1)+"-"+date.getDate() +" "+date.getHours()+":"+date.getMinutes()+":"+date.getSeconds(); 6 var setDate = new Date(setTime); 7 var leftTime = setDate.getTime()- date.getTime(); 8 /* 9 ?10 var Day = parseInt(dg/86400000);11 var hg = dg - Day*86400000;12 var Hours = parseInt(hg/3600000);;13 var mg = hg - Hours*3600000;14 var Minutes = parseInt(mg/60000);15 var sg = mg - Minutes*60000;16 var s = parseInt(sg/1000);17 var dTime = Day + " 天 "+Hours + " 时 "+Minutes + " 分 "+s + " 秒 ";*/18 19 var d,h,m,s;20 if (leftTime>=0) {21 d = Math.floor(leftTime/1000/60/60/24);22 h = Math.floor(leftTime/1000/60/60%24);23 m = Math.floor(leftTime/1000/60%60);24 s = Math.floor(leftTime/1000%60);25 }26 var dTime = d + " 天 "+h + " 时 "+m + " 分 "+s + " 秒 ";27 28 ?29 //$("#time").html("倒计时:"+dTime);30 }