Ruby-like Question: Make this function shorter (ActionScript 3)

Question

I just wrote this incredibly verbose code to turn numbers like 2 into 02. Can you make this function shorter, please (maintaning the functionality)?

Answer 1

Props to dirkgently and all others who have responded here, but apparently people are voting up without actually trying the code.

dirkgently's final function is mostly correct, but his '>' needs to be a '<'.

This function performs as desired (tested fairly thoroughly):

public static function format(n:int, minimumLength:int):String {
  var v:String = n.toString();
  var stillNeed:int = minimumLength - v.length;
  return (stillNeed < 0) ? v : String(Math.pow(10, stillNeed) + v).substr(1);
}