JavaScript: integer suffixes (1st, 2nd, 3rd...)

suffix.js

var suffix = function(n) {
	var d = (n|0)%100;
	return d > 3 && d < 21 ? 'th' : ['th', 'st', 'nd', 'rd'][d%10] || 'th';
};

// suffix(1) => "st"
// suffix(102) => "nd"
// suffix(113) => "th"

Thanks for the gist, I have an updated version here:
https://gist.github.com/dubbs/5535349

@dubbs - Yours does not function correctly!