<script Language="javascript">
var seconds = 10;//记数时间
var handle;//事件柄

//开始记数器
function startTimer() {
handle = setInterval("timer()",1000);
}

//结束记数器
function stopTimer() {
clearInterval(handle);
seconds = 10;
document.all.redhacker.innerHTML = "10秒钟倒计时完成";
}

//计数器
function timer() {
seconds -= 1;
document.all.redhacker.innerHTML = "您还有 <font color='red'>" + seconds + "</font> 秒";
if (seconds == 0) {
stopTimer();
document.reTranForm.submit();
}
}

//1秒后显示计数器
setTimeout("startTimer()",1000);
</script>
<div id="redhacker"></div>