AS2 Number binary representation

/**
 * Returns the binary representation of a number
 * 
 * @param	A number
 * @return	A string of 1's and 0's
 */
private function toBinary(n:Number):String {
	var s:String = "";
	var i:Number = 0;
	var b:Number = n >> i;

	while (b > 0) {
		var d:String = (b & 1) ? "1" : "0";
		b = n >> ++i;
		s = d + s;
	}

	return s;
}