var Pad = function (str, len, pad, dir){ 
if (len === undefined) { 
len = 0; 
} 
if (pad === undefined) { 
pad = ' '; 
} 
if (dir === undefined) { 
dir = 3; 
} 
str = str.toString(); 
var padlen = 0; 
if (len + 1 >= _AN_Read_length('length', str)) { 
switch (dir){ 
case 1: str = new Array(len + 1 - (_AN_Read_length('length', str))).join(pad) + str; 
break ; 
case 3: var right = Math.ceil((padlen = len - _AN_Read_length('length', str)) / 2); 
var left = padlen - right; 
str = new Array(left + 1).join(pad) + str + new Array(right + 1).join(pad); 
break ; 
default : { 
str = str + new Array(len + 1 - (_AN_Read_length('length', str))).join(pad); 
break ; 
} 
} 
} 
return str; 
} 
; 
module.exports = Pad;