A Simple JavaScript Redirect Timer

<p class="lead">If this page does not redirect automatically, please <a href="/congratulations">click here</a>.</p>

<p class="lead">Redirecting in <span id="DispSec">5</span> seconds.</p>

<script type="text/javascript">

TimerSeconds = 5;
var TimerVar = setInterval(startTimer, 1000);

function startTimer() 
{
    if (TimerSeconds < 1)
    {
        clearInterval(TimerVar);
 location.href = "congratulations";
    }

    document.getElementById("DispSec").innerHTML = TimerSeconds;
    TimerSeconds--;
}
</script>