text: //pads left
  String.prototype.lpad = function(padString, length) {
  	var str = this;
      while (str.length < length)
          str = padString + str;
      return str;
  }
   
  //pads right
  String.prototype.rpad = function(padString, length) {
  	var str = this;
      while (str.length < length)
          str = str + padString;
      return str;
  }