var now = new Date();var end = new Date("Jun 17,2017 00:00:00");function getTime(now, end){ var time=Math.floor((end-now)/1000);//转化单位为秒。 var day=Math.floor(time/86400);//1天86400秒; var hour =Math.floor(time%86400/3600);//1小时3600秒； var minute=Math.floor(time%3600/60); var second=Math.floor(time%60); return "还剩下"+day+"天"+hour+"小时"+minute+"分"+second+"秒"；}