倒计时功能

window.onload = function(){

showtime()

function showtime(){

var www = document.getElementById('www');//页面需要有一个id展示倒计时

var Newtime = new Date();// 获取当前时间

var endtime = new Date('2015/12/11,14:44:00'); // 设置结束时间

var lefttime=parseInt((endtime.getTime()-Newtime.getTime())/1000); //获取差值

 

if(lefttime>0){

var date = parseInt(lefttime/(60*60*24)); //转化为天

var hours = parseInt(lefttime/(60*60)%24);//转化为小时

var minute= parseInt(lefttime/60%60);//转化为分钟

var second= parseInt(lefttime%60); //转化为秒

www.innerHTML = date+'日'+hours+':'+minute+':'+second //展示

setTimeout(showtime,1000)

}else{

//倒计时归零

www.innerHTML = 00+'日'+0+':'+0+':'+0

}

}

}