mhcornejo

var functions = { 
  a1: function (number, max) { return print(number + 1, max); }, 
  aNaN: function (number, max) { return null;} 
};
function print(number, max){    
  document.write(number + '<br />');  
  var left = max - number;
  var index = left/left;  
  return functions['a' + index.toString()](number, max); 
}