倒记时
<div>距離15點(diǎn)還有[<span id="spanTime">00:00:00</span>]</div> function addZero(value) {return value < 10 ? "0" + value : value;}function timeDiff() {var nowTime = new Date();var tarTime = new Date("2017/01/13 17:00:00");var spanTime = tarTime - nowTime;if(spanTime<=0){window.clearInterval(timer);return "活動結(jié)束了";}var hour = Math.floor(spanTime / (1000 * 60 * 60)); //計算出時間spanTime=spanTime-(hour*1000 * 60 * 60); //減去小時var minute=Math.floor(spanTime/(1000*60)); //計算出分鐘數(shù)
spanTime=spanTime-(minute*1000*60); //減去分鐘var second=Math.floor(spanTime/1000); //計算出秒數(shù)return addZero(hour)+":"+addZero(minute)+":"+addZero(second);}var spanTime=document.getElementById("spanTime");spanTime.innerHTML=timeDiff();var timer=window.setInterval(function(){spanTime.innerHTML=timeDiff();},1000)
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轉(zhuǎn)載于:https://www.cnblogs.com/xuemingyao/p/6282961.html
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