code: function commaify(s) {
  	var w = 3;
  	if(s.length <= w) return s;
  	var j = (s.length % w), o = s.substr(0,j);
  	for(; j!=s.length; j+=w) o+=(o.length > 0 ? "," : "") + s.substr(j,w);
  	return o;
  }
docs: /*jshint +W086