简单倒计时跳转代码(from:sysoft.cc)

<script type="text/javascript">
        window.onload = function () {
            timetrade();
        }
        function timetrade() {
            var timestr = document.getElementById("timeout").innerHTML;
            var time = parseInt(timestr);
//            alert(time);
            if (time > 0) {

                time--;
                document.getElementById("timeout").innerHTML = time;
                
                setTimeout(timetrade, 1000);
                
            }
            else {
                var url = document.getElementById(‘<%=Link.ClientID%>‘).href;
                window.location = url;
            }
            
         }
    </script>