text: ;(function (window) {
  
    var
      characters = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=',
      fromCharCode = String.fromCharCode,
      INVALID_CHARACTER_ERR = (function () {
        // fabricate a suitable error object
        try { document.createElement('$'); }
        catch (error) { return error; }}());
  
    // encoder
    window.btoa || (
    window.btoa = function (string) {
      var
        a, b, b1, b2, b3, b4, c, i = 0,
        len = string.length, max = Math.max, result = '';
  
      while (i < len) {
        a = string.charCodeAt(i++) || 0;
        b = string.charCodeAt(i++) || 0;
        c = string.charCodeAt(i++) || 0;
  
        if (max(a, b, c) > 0xFF) {
          throw INVALID_CHARACTER_ERR;
        }
  
        b1 = (a >> 2) & 0x3F;
        b2 = ((a & 0x3) << 4) | ((b >> 4) & 0xF);
        b3 = ((b & 0xF) << 2) | ((c >> 6) & 0x3);
        b4 = c & 0x3F;
  
        if (!b) {
          b3 = b4 = 64;
        } else if (!c) {
          b4 = 64;
        }
        result += characters.charAt(b1) + characters.charAt(b2) + characters.charAt(b3) + characters.charAt(b4);
      }
      return result;
    });
  
    // decoder
    window.atob || (
    window.atob = function (string) {
      string = string.replace(/=+$/, '');
      var
        a, b, b1, b2, b3, b4, c, i = 0,
        len = string.length, chars = [];
  
      if (len % 4 === 1) throw INVALID_CHARACTER_ERR;
  
      while (i < len) {
        b1 = characters.indexOf(string.charAt(i++));
        b2 = characters.indexOf(string.charAt(i++));
        b3 = characters.indexOf(string.charAt(i++));
        b4 = characters.indexOf(string.charAt(i++));
  
        a = ((b1 & 0x3F) << 2) | ((b2 >> 4) & 0x3);
        b = ((b2 & 0xF) << 4) | ((b3 >> 2) & 0xF);
        c = ((b3 & 0x3) << 6) | (b4 & 0x3F);
  
        chars.push(fromCharCode(a));
        b && chars.push(fromCharCode(b));
        c && chars.push(fromCharCode(c));
      }
      return chars.join('');
    });
  
  }(this));
  
  var from_base = atob;