[ JavaScript ] Problem with leading Zero ( countdown )

Hey !

I have this piece of code, which is a countdown :

<span id="countdown"></span>

<script type="text/javascript">

 var start = 6;
 Number.prototype.toMinutesAndSeconds = function() {
var nbr = Math.floor(this / 60);
return (nbr+"")+(((nbr=(this-(nbr*60)))<10)?""+nbr:nbr);
}

function display(seconds, output) {
output.innerHTML = (--seconds).toMinutesAndSeconds();
if(seconds > 0) {
	window.setTimeout(function(){display(seconds, output)}, 1000);
}

if(seconds < 11) {
	document.getElementById("notifier").innerHTML = "";
}

if (seconds == 0) {
	document.getElementById("notifier").innerHTML = "";
}
}
display(start, document.getElementById("countdown"));

</script>

What I want to do is remove the leading zero on the countdown. How do I do that ?

Thanks.

Revs.