js 实现5秒倒计时后跳转页面

<script type="text/javascript">
        function countDown(secs, surl) {
            var jumpTo = document.getElementById('jumpTo');
            jumpTo.innerHTML = secs;
            if (--secs > 0) {
                setTimeout("countDown(" + secs + ",'" + surl + "')", 1000);
            }
            else {
                location.href = surl;
            }
        }     
    </script>

使用方法:

<div>
        <h2>
            发生错误，<span id="jumpTo">5</span>秒后自动跳转到首页，返回后请联系客服!</h2>
    </div>
    <script type="text/javascript">        countDown(5, '/default.aspx');</script>