js 实现倒计时

<pre name="code" class="javascript">function run(){//alert("秒表倒计时器");var s = document.getElementById("totalsecond");if(s.innerHTML == 0){window.location.href='http://www.cqcrj.gov.cn';return false;}s.innerHTML = s.innerHTML * 1 - 1;}function init(){ window.setInterval("run();", 1000);}