JavaScript实现倒计时跳转页面功能【实用】

<!--这里定义倒计时开始数值-->
<span id="totalSecond">5</span>
<!--定义js变量及方法-->
<script language="javascript" type="text/javascript">
var second = document.getElementById('totalSecond').textContent;
if (navigator.appName.indexOf("Explorer") > -1)
{
second = document.getElementById('totalSecond').innerText; 
} else
{
second = document.getElementById('totalSecond').textContent; 
}
setInterval("redirect()", 1000); 
function redirect()
{
if (second < 0)
{
 <!--定义倒计时后跳转页面-->
location.href = 'default.aspx'; 
} else
{
if (navigator.appName.indexOf("Explorer") > -1)
{
document.getElementById('totalSecond').innerText = second--; 
} else
{
document.getElementById('totalSecond').textContent = second--; 
}
}
}
</script>