恰好寫過一個，沒有小數(shù)

<script>

var timedate = new Date("May 1,2018"); //目標(biāo)時間

var times = "五一長假";

var now = new Date(); //獲取現(xiàn)在時間

var date = timedate.getTime() - now.getTime();

//

var time = Math.floor(date / (1000 * 60 * 60 * 24));

var hours = Math.floor(date / (1000 * 60 * 60));

if(time >= 0)

document.write("現(xiàn)在離" + times + "還有：" + time + "天"+"("+hours+"小時)");

</script>