Base64 encoder with UTF-8 encoding - Base64 Button function for http://www.whak.ca/packer/LZW(HAK).htm

base64-encoder-utf.js

function b2a(r) {
  function utf(r) {
    var t, e, o;
    for (r = r.replace(/\r\n/g, "\n"), t = "", e = 0; e < r.length; e++) o = r.charCodeAt(e), 
    128 > o ? t += String.fromCharCode(o) :o > 127 && 2048 > o ? (t += String.fromCharCode(192 | o >> 6), 
    t += String.fromCharCode(128 | 63 & o)) :(t += String.fromCharCode(224 | o >> 12), 
    t += String.fromCharCode(128 | 63 & o >> 6), t += String.fromCharCode(128 | 63 & o));
    return t;
  }
  var t, a, h, e, o, c, n = "", C = 0, i = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";
  for (r = utf(r); C < r.length; ) t = r.charCodeAt(C++), a = r.charCodeAt(C++), h = r.charCodeAt(C++), 
  e = t >> 2, t = (3 & t) << 4 | a >> 4, o = (15 & a) << 2 | h >> 6, c = 63 & h, isNaN(a) ? o = c = 64 :isNaN(h) && (c = 64), 
  n = n + i.charAt(e) + i.charAt(t) + i.charAt(o) + i.charAt(c);
  return n;
}