js html页面倒计时可精确到秒，简单实用

"utf-8" >

"CountMsg" class= "HotDate" > "t_d" >00天 "t_h" >00时 "t_m" >00分 "t_s" >00秒

<code class="js string">"text/javascript"</code> <code class="js plain">> </code> </div> <div class="line number17 index16 alt2"> <code class="js keyword">function</code> <code class="js plain"> getRTime(){ </code> </div> <div class="line number18 index17 alt1"> <code class="js keyword">var</code> <code class="js plain"> EndTime= </code> <code class="js keyword">new</code> <code class="js plain">Date(</code> <code class="js string">'2014/10/23 10:00:00'</code> <code class="js plain">); </code> <code class="js comments">//截止时间 </code> </div> <div class="line number19 index18 alt2"> <code class="js keyword">var</code> <code class="js plain"> NowTime = </code> <code class="js keyword">new</code> <code class="js plain">Date(); </code> </div> <div class="line number20 index19 alt1"> <code class="js keyword">var</code> <code class="js plain"> t =EndTime.getTime() - NowTime.getTime(); </code> </div> <div class="line number21 index20 alt2"> <code class="js comments">/*var d=Math.floor(t/1000/60/60/24); </code> </div> <div class="line number22 index21 alt1"> <code class="js comments">t-=d*(1000*60*60*24); </code> </div> <div class="line number23 index22 alt2"> <code class="js comments">var h=Math.floor(t/1000/60/60); </code> </div> <div class="line number24 index23 alt1"> <code class="js comments">t-=h*60*60*1000; </code> </div> <div class="line number25 index24 alt2"> <code class="js comments">var m=Math.floor(t/1000/60); </code> </div> <div class="line number26 index25 alt1"> <code class="js comments">t-=m*60*1000; </code> </div> <div class="line number27 index26 alt2"> <code class="js comments">var s=Math.floor(t/1000);*/</code> </div> <div class="line number28 index27 alt1">   </div> <div class="line number29 index28 alt2"> <code class="js keyword">var</code> <code class="js plain"> d=Math.floor(t/1000/60/60/24); </code> </div> <div class="line number30 index29 alt1"> <code class="js keyword">var</code> <code class="js plain"> h=Math.floor(t/1000/60/60%24); </code> </div> <div class="line number31 index30 alt2"> <code class="js keyword">var</code> <code class="js plain"> m=Math.floor(t/1000/60%60); </code> </div> <div class="line number32 index31 alt1"> <code class="js keyword">var</code> <code class="js plain"> s=Math.floor(t/1000%60); </code> </div> <div class="line number33 index32 alt2">   </div> <div class="line number34 index33 alt1"> <code class="js plain">document.getElementById(</code> <code class="js string">"t_d"</code> <code class="js plain">).innerHTML = d + </code> <code class="js string">"天"</code> <code class="js plain">; </code> </div> <div class="line number35 index34 alt2"> <code class="js plain">document.getElementById(</code> <code class="js string">"t_h"</code> <code class="js plain">).innerHTML = h + </code> <code class="js string">"时"</code> <code class="js plain">; </code> </div> <div class="line number36 index35 alt1"> <code class="js plain">document.getElementById(</code> <code class="js string">"t_m"</code> <code class="js plain">).innerHTML = m + </code> <code class="js string">"分"</code> <code class="js plain">; </code> </div> <div class="line number37 index36 alt2"> <code class="js plain">document.getElementById(</code> <code class="js string">"t_s"</code> <code class="js plain">).innerHTML = s + </code> <code class="js string">"秒"</code> <code class="js plain">; </code> </div> <div class="line number38 index37 alt1"> <code class="js plain">} </code> </div> <div class="line number39 index38 alt2"> <code class="js plain">setInterval(getRTime,1000); </code> </div> <div class="line number40 index39 alt1"> <code class="js plain">