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第一个：
<html><head><meta http-equiv="Content-Type" content="text/html; charset=gb2312"><title>counter</title><script language="javascript" type="text/JavaScript">function Counter(nMax,nInterval){this.maxTime=nMax;this.interval=nInterval;this.objId="timer";this.obj=null;this.num=this.maxTime;this.timer=null;this.start=function(){ this.obj=document.getElementById(this.objId);if(this.num>0) setTimeout(this.run,this.interval*1000);};this.run=function(){if(myCounter.num>0) {myCounter.num--;myCounter.obj.innerHTML=myCounter.num;myCounter.timer=setTimeout(myCounter.run,myCounter.interval*1000);}else clearTimeout(myCounter.timer);};this.show=function(){document.write("<span id="+this.objId+">"+this.num+"</span>");this.obj=document.getElementById(this.objId);//alert(this.obj.innerHTML);}}</script></head><body onload="myCounter.start();"><script language="JavaScript" type="text/JavaScript">var myCounter=new Counter(10,1);</script><p>现在剩下<script language="JavaScript" type="text/JavaScript">myCounter.show();</script>秒钟!</p> |
第二个：很中庸的倒计时，我用的这个
请等待<span id="dd">10</span>秒<script type="text/javascript">function run(){ var s = document.getElementById("dd"); if(s.innerHTML == 0){ window.location.href=‘www.baidu.com‘; return false; } s.innerHTML = s.innerHTML * 1 - 1;}window.setInterval("run();", 1000);</script> |
第三个：毫秒级的，比较紧张：
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <script type="text/javascript"> <!-- var duration=9900; var endTime = new Date().getTime() + duration + 100; function interval() { var n=(endTime-new Date().getTime())/1000; if(n<0) return; document.getElementById("timeout").innerHTML = n.toFixed(3); setTimeout(interval, 10); } window.onload=function() { interval(); } //--> </script><head runat="server"> <title>等待10秒</title></head><body> <form id="form1" runat="server"> <div> 现在剩下 <span id="timeout">10.000</span> 秒后 将自动跳转 </div> </form></body></html> |
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原文地址：http://www.cnblogs.com/jthb/p/4674274.html
