--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/program/js/common.js	Thu Jan 04 15:52:31 2018 -0500
@@ -0,0 +1,793 @@
+/**
+ * Roundcube common js library
+ *
+ * This file is part of the Roundcube Webmail client
+ *
+ * @licstart  The following is the entire license notice for the
+ * JavaScript code in this file.
+ *
+ * Copyright (c) 2005-2014, The Roundcube Dev Team
+ *
+ * The JavaScript code in this page is free software: you can
+ * redistribute it and/or modify it under the terms of the GNU
+ * General Public License (GNU GPL) as published by the Free Software
+ * Foundation, either version 3 of the License, or (at your option)
+ * any later version.  The code is distributed WITHOUT ANY WARRANTY;
+ * without even the implied warranty of MERCHANTABILITY or FITNESS
+ * FOR A PARTICULAR PURPOSE.  See the GNU GPL for more details.
+ *
+ * As additional permission under GNU GPL version 3 section 7, you
+ * may distribute non-source (e.g., minimized or compacted) forms of
+ * that code without the copy of the GNU GPL normally required by
+ * section 4, provided you include this license notice and a URL
+ * through which recipients can access the Corresponding Source.
+ *
+ * @licend  The above is the entire license notice
+ * for the JavaScript code in this file.
+ */
+
+// Constants
+var CONTROL_KEY = 1;
+var SHIFT_KEY = 2;
+var CONTROL_SHIFT_KEY = 3;
+
+/**
+ * Default browser check class
+ * @constructor
+ */
+function roundcube_browser()
+{
+  var n = navigator;
+
+  this.agent = n.userAgent;
+  this.agent_lc = n.userAgent.toLowerCase();
+  this.name = n.appName;
+  this.vendor = n.vendor ? n.vendor : '';
+  this.vendver = n.vendorSub ? parseFloat(n.vendorSub) : 0;
+  this.product = n.product ? n.product : '';
+  this.platform = String(n.platform).toLowerCase();
+  this.lang = n.language ? n.language.substring(0,2) :
+              n.browserLanguage ? n.browserLanguage.substring(0,2) :
+              n.systemLanguage ? n.systemLanguage.substring(0,2) : 'en';
+
+  this.win = this.platform.indexOf('win') >= 0;
+  this.mac = this.platform.indexOf('mac') >= 0;
+  this.linux = this.platform.indexOf('linux') >= 0;
+  this.unix = this.platform.indexOf('unix') >= 0;
+
+  this.dom = document.getElementById ? true : false;
+  this.dom2 = document.addEventListener && document.removeEventListener;
+
+  this.edge = this.agent_lc.indexOf(' edge/') > 0;
+  this.webkit = !this.edge && this.agent_lc.indexOf('applewebkit') > 0;
+  this.ie = (document.all && !window.opera) || (this.win && this.agent_lc.indexOf('trident/') > 0);
+
+  if (window.opera) {
+    this.opera = true; // Opera < 15
+    this.vendver = opera.version();
+  }
+  else if (!this.ie && !this.edge) {
+    this.chrome = this.agent_lc.indexOf('chrome') > 0;
+    this.opera = this.webkit && this.agent.indexOf(' OPR/') > 0; // Opera >= 15
+    this.safari = !this.chrome && !this.opera && (this.webkit || this.agent_lc.indexOf('safari') > 0);
+    this.konq = this.agent_lc.indexOf('konqueror') > 0;
+    this.mz = this.dom && !this.chrome && !this.safari && !this.konq && !this.opera && this.agent.indexOf('Mozilla') >= 0;
+    this.iphone = this.safari && (this.agent_lc.indexOf('iphone') > 0 || this.agent_lc.indexOf('ipod') > 0);
+    this.ipad = this.safari && this.agent_lc.indexOf('ipad') > 0;
+  }
+
+  if (!this.vendver) {
+    // common version strings
+    this.vendver = /(opera|opr|khtml|chrome|safari|applewebkit|msie)(\s|\/)([0-9\.]+)/.test(this.agent_lc) ? parseFloat(RegExp.$3) : 0;
+
+    // any other (Mozilla, Camino, IE>=11)
+    if (!this.vendver)
+      this.vendver = /rv:([0-9\.]+)/.test(this.agent) ? parseFloat(RegExp.$1) : 0;
+  }
+
+  // get real language out of safari's user agent
+  if (this.safari && (/;\s+([a-z]{2})-[a-z]{2}\)/.test(this.agent_lc)))
+    this.lang = RegExp.$1;
+
+  this.tablet = /ipad|android|xoom|sch-i800|playbook|tablet|kindle/i.test(this.agent_lc);
+  this.mobile = /iphone|ipod|blackberry|iemobile|opera mini|opera mobi|mobile/i.test(this.agent_lc);
+  this.touch = this.mobile || this.tablet;
+  this.pointer = typeof window.PointerEvent == "function";
+  this.cookies = n.cookieEnabled;
+
+  // test for XMLHTTP support
+  this.xmlhttp_test = function()
+  {
+    var activeX_test = new Function("try{var o=new ActiveXObject('Microsoft.XMLHTTP');return true;}catch(err){return false;}");
+    this.xmlhttp = window.XMLHttpRequest || (('ActiveXObject' in window) && activeX_test());
+    return this.xmlhttp;
+  };
+
+  // set class names to html tag according to the current user agent detection
+  // this allows browser-specific css selectors like "html.chrome .someclass"
+  this.set_html_class = function()
+  {
+    var classname = ' js';
+
+    if (this.ie)
+      classname += ' ie ie'+parseInt(this.vendver);
+    else if (this.opera)
+      classname += ' opera';
+    else if (this.konq)
+      classname += ' konqueror';
+    else if (this.safari)
+      classname += ' chrome';
+    else if (this.chrome)
+      classname += ' chrome';
+    else if (this.mz)
+      classname += ' mozilla';
+
+    if (this.iphone)
+      classname += ' iphone';
+    else if (this.ipad)
+      classname += ' ipad';
+    else if (this.webkit)
+      classname += ' webkit';
+
+    if (this.mobile)
+      classname += ' mobile';
+    if (this.tablet)
+      classname += ' tablet';
+
+    if (document.documentElement)
+      document.documentElement.className += classname;
+  };
+};
+
+
+// static functions for DOM event handling
+var rcube_event = {
+
+/**
+ * returns the event target element
+ */
+get_target: function(e)
+{
+  e = e || window.event;
+  return e && e.target ? e.target : e.srcElement;
+},
+
+/**
+ * returns the event key code
+ */
+get_keycode: function(e)
+{
+  e = e || window.event;
+  return e && e.keyCode ? e.keyCode : (e && e.which ? e.which : 0);
+},
+
+/**
+ * returns the event key code
+ */
+get_button: function(e)
+{
+  e = e || window.event;
+  return e && e.button !== undefined ? e.button : (e && e.which ? e.which : 0);
+},
+
+/**
+ * returns modifier key (constants defined at top of file)
+ */
+get_modifier: function(e)
+{
+  var opcode = 0;
+  e = e || window.event;
+
+  if (bw.mac && e)
+    opcode += (e.metaKey && CONTROL_KEY) + (e.shiftKey && SHIFT_KEY);
+  else if (e)
+    opcode += (e.ctrlKey && CONTROL_KEY) + (e.shiftKey && SHIFT_KEY);
+
+  return opcode;
+},
+
+/**
+ * Return absolute mouse position of an event
+ */
+get_mouse_pos: function(e)
+{
+  if (!e) e = window.event;
+  var mX = (e.pageX) ? e.pageX : e.clientX,
+    mY = (e.pageY) ? e.pageY : e.clientY;
+
+  if (document.body && document.all) {
+    mX += document.body.scrollLeft;
+    mY += document.body.scrollTop;
+  }
+
+  if (e._offset) {
+    mX += e._offset.left;
+    mY += e._offset.top;
+  }
+
+  return { x:mX, y:mY };
+},
+
+/**
+ * Add an object method as event listener to a certain element
+ */
+add_listener: function(p)
+{
+  if (!p.object || !p.method)  // not enough arguments
+    return;
+  if (!p.element)
+    p.element = document;
+
+  if (!p.object._rc_events)
+    p.object._rc_events = {};
+
+  var key = p.event + '*' + p.method;
+  if (!p.object._rc_events[key])
+    p.object._rc_events[key] = function(e){ return p.object[p.method](e); };
+
+  if (p.element.addEventListener)
+    p.element.addEventListener(p.event, p.object._rc_events[key], false);
+  else if (p.element.attachEvent) {
+    // IE allows multiple events with the same function to be applied to the same object
+    // forcibly detach the event, then attach
+    p.element.detachEvent('on'+p.event, p.object._rc_events[key]);
+    p.element.attachEvent('on'+p.event, p.object._rc_events[key]);
+  }
+  else
+    p.element['on'+p.event] = p.object._rc_events[key];
+},
+
+/**
+ * Remove event listener
+ */
+remove_listener: function(p)
+{
+  if (!p.element)
+    p.element = document;
+
+  var key = p.event + '*' + p.method;
+  if (p.object && p.object._rc_events && p.object._rc_events[key]) {
+    if (p.element.removeEventListener)
+      p.element.removeEventListener(p.event, p.object._rc_events[key], false);
+    else if (p.element.detachEvent)
+      p.element.detachEvent('on'+p.event, p.object._rc_events[key]);
+    else
+      p.element['on'+p.event] = null;
+  }
+},
+
+/**
+ * Prevent event propagation and bubbling
+ */
+cancel: function(evt)
+{
+  var e = evt ? evt : window.event;
+
+  if (e.preventDefault)
+    e.preventDefault();
+  else
+    e.returnValue = false;
+
+  if (e.stopPropagation)
+    e.stopPropagation();
+
+  e.cancelBubble = true;
+
+  return false;
+},
+
+/**
+ * Determine whether the given event was trigered from keyboard
+ */
+is_keyboard: function(e)
+{
+  return e && (
+      (e.type && String(e.type).match(/^key/)) // DOM3-compatible
+      || (!e.pageX && (e.pageY || 0) <= 0 && !e.clientX && (e.clientY || 0) <= 0) // others
+    );
+},
+
+/**
+ * Accept event if triggered from keyboard action (e.g. <Enter>)
+ */
+keyboard_only: function(e)
+{
+  return rcube_event.is_keyboard(e) ? true : rcube_event.cancel(e);
+},
+
+touchevent: function(e)
+{
+  return { pageX:e.pageX, pageY:e.pageY, offsetX:e.pageX - e.target.offsetLeft, offsetY:e.pageY - e.target.offsetTop, target:e.target, istouch:true };
+}
+
+};
+
+
+/**
+ * rcmail objects event interface
+ */
+function rcube_event_engine()
+{
+  this._events = {};
+};
+
+rcube_event_engine.prototype = {
+
+/**
+ * Setter for object event handlers
+ *
+ * @param {String}   Event name
+ * @param {Function} Handler function
+ */
+addEventListener: function(evt, func, obj)
+{
+  if (!this._events)
+    this._events = {};
+  if (!this._events[evt])
+    this._events[evt] = [];
+
+  this._events[evt].push({func:func, obj:obj ? obj : window});
+
+  return this; // chainable
+},
+
+/**
+ * Removes a specific event listener
+ *
+ * @param {String} Event name
+ * @param {Int}    Listener ID to remove
+ */
+removeEventListener: function(evt, func, obj)
+{
+  if (obj === undefined)
+    obj = window;
+
+  for (var h,i=0; this._events && this._events[evt] && i < this._events[evt].length; i++)
+    if ((h = this._events[evt][i]) && h.func == func && h.obj == obj)
+      this._events[evt][i] = null;
+},
+
+/**
+ * This will execute all registered event handlers
+ *
+ * @param {String} Event to trigger
+ * @param {Object} Event object/arguments
+ */
+triggerEvent: function(evt, e)
+{
+  var ret, h;
+
+  if (e === undefined)
+    e = this;
+  else if (typeof e === 'object')
+    e.event = evt;
+
+  if (!this._event_exec)
+    this._event_exec = {};
+
+  if (this._events && this._events[evt] && !this._event_exec[evt]) {
+    this._event_exec[evt] = true;
+    for (var i=0; i < this._events[evt].length; i++) {
+      if ((h = this._events[evt][i])) {
+        if (typeof h.func === 'function')
+          ret = h.func.call ? h.func.call(h.obj, e) : h.func(e);
+        else if (typeof h.obj[h.func] === 'function')
+          ret = h.obj[h.func](e);
+
+        // cancel event execution
+        if (ret !== undefined && !ret)
+          break;
+      }
+    }
+    if (ret && ret.event) {
+      try {
+        delete ret.event;
+      } catch (err) {
+        // IE6-7 doesn't support deleting HTMLFormElement attributes (#1488017)
+        $(ret).removeAttr('event');
+      }
+    }
+  }
+
+  delete this._event_exec[evt];
+
+  if (e.event) {
+    try {
+      delete e.event;
+    } catch (err) {
+      // IE6-7 doesn't support deleting HTMLFormElement attributes (#1488017)
+      $(e).removeAttr('event');
+    }
+  }
+
+  return ret;
+}
+
+};  // end rcube_event_engine.prototype
+
+
+// check if input is a valid email address
+// By Cal Henderson <cal@iamcal.com>
+// http://code.iamcal.com/php/rfc822/
+function rcube_check_email(input, inline, count)
+{
+  if (!input)
+    return count ? 0 : false;
+
+  if (count) inline = true;
+
+  var qtext = '[^\\x0d\\x22\\x5c\\x80-\\xff]',
+      dtext = '[^\\x0d\\x5b-\\x5d\\x80-\\xff]',
+      atom = '[^\\x00-\\x20\\x22\\x28\\x29\\x2c\\x2e\\x3a-\\x3c\\x3e\\x40\\x5b-\\x5d\\x7f-\\xff]+',
+      quoted_pair = '\\x5c[\\x00-\\x7f]',
+      quoted_string = '\\x22('+qtext+'|'+quoted_pair+')*\\x22',
+      ipv4 = '\\[(25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9]?[0-9])(\.(25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9]?[0-9])){3}\\]',
+      ipv6 = '\\[IPv6:[0-9a-f:.]+\\]',
+      ip_addr = '(' + ipv4 + ')|(' + ipv6 + ')',
+      // Use simplified domain matching, because we need to allow Unicode characters here
+      // So, e-mail address should be validated also on server side after idn_to_ascii() use
+      //domain_literal = '\\x5b('+dtext+'|'+quoted_pair+')*\\x5d',
+      //sub_domain = '('+atom+'|'+domain_literal+')',
+      // allow punycode/unicode top-level domain
+      domain = '(('+ip_addr+')|(([^@\\x2e]+\\x2e)+([^\\x00-\\x40\\x5b-\\x60\\x7b-\\x7f]{2,}|xn--[a-z0-9]{2,})))',
+      // ICANN e-mail test (http://idn.icann.org/E-mail_test)
+      icann_domains = [
+        '\\u0645\\u062b\\u0627\\u0644\\x2e\\u0625\\u062e\\u062a\\u0628\\u0627\\u0631',
+        '\\u4f8b\\u5b50\\x2e\\u6d4b\\u8bd5',
+        '\\u4f8b\\u5b50\\x2e\\u6e2c\\u8a66',
+        '\\u03c0\\u03b1\\u03c1\\u03ac\\u03b4\\u03b5\\u03b9\\u03b3\\u03bc\\u03b1\\x2e\\u03b4\\u03bf\\u03ba\\u03b9\\u03bc\\u03ae',
+        '\\u0909\\u0926\\u093e\\u0939\\u0930\\u0923\\x2e\\u092a\\u0930\\u0940\\u0915\\u094d\\u0937\\u093e',
+        '\\u4f8b\\u3048\\x2e\\u30c6\\u30b9\\u30c8',
+        '\\uc2e4\\ub840\\x2e\\ud14c\\uc2a4\\ud2b8',
+        '\\u0645\\u062b\\u0627\\u0644\\x2e\\u0622\\u0632\\u0645\\u0627\\u06cc\\u0634\u06cc',
+        '\\u043f\\u0440\\u0438\\u043c\\u0435\\u0440\\x2e\\u0438\\u0441\\u043f\\u044b\\u0442\\u0430\\u043d\\u0438\\u0435',
+        '\\u0b89\\u0ba4\\u0bbe\\u0bb0\\u0ba3\\u0bae\\u0bcd\\x2e\\u0baa\\u0bb0\\u0bbf\\u0b9f\\u0bcd\\u0b9a\\u0bc8',
+        '\\u05d1\\u05f2\\u05b7\\u05e9\\u05e4\\u05bc\\u05d9\\u05dc\\x2e\\u05d8\\u05e2\\u05e1\\u05d8'
+      ],
+      icann_addr = 'mailtest\\x40('+icann_domains.join('|')+')',
+      word = '('+atom+'|'+quoted_string+')',
+      delim = '[,;\\s\\n]',
+      local_part = word+'(\\x2e'+word+')*',
+      addr_spec = '(('+local_part+'\\x40'+domain+')|('+icann_addr+'))',
+      rx_flag = count ? 'ig' : 'i',
+      rx = inline ? new RegExp('(^|<|'+delim+')'+addr_spec+'($|>|'+delim+')', rx_flag) : new RegExp('^'+addr_spec+'$', 'i');
+
+  if (count)
+    return input.match(rx).length;
+
+  return rx.test(input);
+};
+
+// recursively copy an object
+function rcube_clone_object(obj)
+{
+  var out = {};
+
+  for (var key in obj) {
+    if (obj[key] && typeof obj[key] === 'object')
+      out[key] = rcube_clone_object(obj[key]);
+    else
+      out[key] = obj[key];
+  }
+
+  return out;
+};
+
+// make a string URL safe (and compatible with PHP's rawurlencode())
+function urlencode(str)
+{
+  if (window.encodeURIComponent)
+    return encodeURIComponent(str).replace('*', '%2A');
+
+  return escape(str)
+    .replace('+', '%2B')
+    .replace('*', '%2A')
+    .replace('/', '%2F')
+    .replace('@', '%40');
+};
+
+
+// get any type of html objects by id/name
+function rcube_find_object(id, d)
+{
+  var n, f, obj, e;
+
+  if (!d) d = document;
+
+  if (d.getElementById)
+    if (obj = d.getElementById(id))
+      return obj;
+
+  if (!obj && d.getElementsByName && (e = d.getElementsByName(id)))
+    obj = e[0];
+
+  if (!obj && d.all)
+    obj = d.all[id];
+
+  if (!obj && d.images.length)
+    obj = d.images[id];
+
+  if (!obj && d.forms.length) {
+    for (f=0; f<d.forms.length; f++) {
+      if (d.forms[f].name == id)
+        obj = d.forms[f];
+      else if(d.forms[f].elements[id])
+        obj = d.forms[f].elements[id];
+    }
+  }
+
+  if (!obj && d.layers) {
+    if (d.layers[id])
+      obj = d.layers[id];
+    for (n=0; !obj && n<d.layers.length; n++)
+      obj = rcube_find_object(id, d.layers[n].document);
+  }
+
+  return obj;
+};
+
+// determine whether the mouse is over the given object or not
+function rcube_mouse_is_over(ev, obj)
+{
+  var mouse = rcube_event.get_mouse_pos(ev),
+    pos = $(obj).offset();
+
+  return (mouse.x >= pos.left) && (mouse.x < (pos.left + obj.offsetWidth)) &&
+    (mouse.y >= pos.top) && (mouse.y < (pos.top + obj.offsetHeight));
+};
+
+
+// cookie functions by GoogieSpell
+function setCookie(name, value, expires, path, domain, secure)
+{
+  var curCookie = name + "=" + escape(value) +
+      (expires ? "; expires=" + expires.toGMTString() : "") +
+      (path ? "; path=" + path : "") +
+      (domain ? "; domain=" + domain : "") +
+      (secure ? "; secure" : "");
+
+  document.cookie = curCookie;
+};
+
+function getCookie(name)
+{
+  var dc = document.cookie,
+    prefix = name + "=",
+    begin = dc.indexOf("; " + prefix);
+
+  if (begin == -1) {
+    begin = dc.indexOf(prefix);
+    if (begin != 0)
+      return null;
+  }
+  else {
+    begin += 2;
+  }
+
+  var end = dc.indexOf(";", begin);
+  if (end == -1)
+    end = dc.length;
+
+  return unescape(dc.substring(begin + prefix.length, end));
+};
+
+// deprecated aliases, to be removed, use rcmail.set_cookie/rcmail.get_cookie
+roundcube_browser.prototype.set_cookie = setCookie;
+roundcube_browser.prototype.get_cookie = getCookie;
+
+var bw = new roundcube_browser();
+bw.set_html_class();
+
+
+// Add escape() method to RegExp object
+// http://dev.rubyonrails.org/changeset/7271
+RegExp.escape = function(str)
+{
+  return String(str).replace(/([.*+?^=!:${}()|[\]\/\\])/g, '\\$1');
+};
+
+// Extend Date prototype to detect Standard timezone without DST
+// from http://www.michaelapproved.com/articles/timezone-detect-and-ignore-daylight-saving-time-dst/
+Date.prototype.getStdTimezoneOffset = function()
+{
+  var m = 12,
+    d = new Date(null, m, 1),
+    tzo = d.getTimezoneOffset();
+
+    while (--m) {
+      d.setUTCMonth(m);
+      if (tzo != d.getTimezoneOffset()) {
+        return Math.max(tzo, d.getTimezoneOffset());
+    }
+  }
+
+  return tzo;
+}
+
+// define String's startsWith() method for old browsers
+if (!String.prototype.startsWith) {
+  String.prototype.startsWith = function(search, position) {
+    position = position || 0;
+    return this.slice(position, search.length) === search;
+  };
+}
+
+// array utility function
+jQuery.last = function(arr) {
+  return arr && arr.length ? arr[arr.length-1] : undefined;
+}
+
+// jQuery plugin to set HTML5 placeholder and title attributes on input elements
+jQuery.fn.placeholder = function(text) {
+  return this.each(function() {
+    $(this).prop({title: text, placeholder: text});
+  });
+};
+
+// function to parse query string into an object
+var rcube_parse_query = function(query)
+{
+  if (!query)
+    return {};
+
+  var params = {}, e, k, v,
+    re = /([^&=]+)=?([^&]*)/g,
+    decodeRE = /\+/g, // Regex for replacing addition symbol with a space
+    decode = function (str) { return decodeURIComponent(str.replace(decodeRE, ' ')); };
+
+  query = query.replace(/\?/, '');
+
+  while (e = re.exec(query)) {
+    k = decode(e[1]);
+    v = decode(e[2]);
+
+    if (k.substring(k.length - 2) === '[]') {
+      k = k.substring(0, k.length - 2);
+      (params[k] || (params[k] = [])).push(v);
+    }
+    else
+      params[k] = v;
+  }
+
+  return params;
+};
+
+
+// Base64 code from Tyler Akins -- http://rumkin.com
+var Base64 = (function () {
+  var keyStr = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";
+
+  // private method for UTF-8 encoding
+  var utf8_encode = function(string) {
+    string = string.replace(/\r\n/g, "\n");
+    var utftext = '';
+
+    for (var n = 0; n < string.length; n++) {
+      var c = string.charCodeAt(n);
+
+      if (c < 128) {
+        utftext += String.fromCharCode(c);
+      }
+      else if(c > 127 && c < 2048) {
+        utftext += String.fromCharCode((c >> 6) | 192);
+        utftext += String.fromCharCode((c & 63) | 128);
+      }
+      else {
+        utftext += String.fromCharCode((c >> 12) | 224);
+        utftext += String.fromCharCode(((c >> 6) & 63) | 128);
+        utftext += String.fromCharCode((c & 63) | 128);
+      }
+    }
+
+    return utftext;
+  };
+
+  // private method for UTF-8 decoding
+  var utf8_decode = function (utftext) {
+    var i = 0, string = '', c = 0, c2 = 0, c3 = 0;
+
+    while (i < utftext.length) {
+      c = utftext.charCodeAt(i);
+      if (c < 128) {
+        string += String.fromCharCode(c);
+        i++;
+      }
+      else if (c > 191 && c < 224) {
+        c2 = utftext.charCodeAt(i + 1);
+        string += String.fromCharCode(((c & 31) << 6) | (c2 & 63));
+        i += 2;
+      }
+      else {
+        c2 = utftext.charCodeAt(i + 1);
+        c3 = utftext.charCodeAt(i + 2);
+        string += String.fromCharCode(((c & 15) << 12) | ((c2 & 63) << 6) | (c3 & 63));
+        i += 3;
+      }
+    }
+
+    return string;
+  };
+
+  var obj = {
+    /**
+     * Encodes a string in base64
+     * @param {String} input The string to encode in base64.
+     */
+    encode: function (input) {
+      // encode UTF8 as btoa() may fail on some characters
+      input = utf8_encode(input);
+
+      if (typeof(window.btoa) === 'function') {
+        try {
+          return btoa(input);
+        }
+        catch (e) {};
+      }
+
+      var chr1, chr2, chr3, enc1, enc2, enc3, enc4, i = 0, output = '', len = input.length;
+
+      while (i < len) {
+        chr1 = input.charCodeAt(i++);
+        chr2 = input.charCodeAt(i++);
+        chr3 = input.charCodeAt(i++);
+
+        enc1 = chr1 >> 2;
+        enc2 = ((chr1 & 3) << 4) | (chr2 >> 4);
+        enc3 = ((chr2 & 15) << 2) | (chr3 >> 6);
+        enc4 = chr3 & 63;
+
+        if (isNaN(chr2))
+          enc3 = enc4 = 64;
+        else if (isNaN(chr3))
+          enc4 = 64;
+
+        output = output
+          + keyStr.charAt(enc1) + keyStr.charAt(enc2)
+          + keyStr.charAt(enc3) + keyStr.charAt(enc4);
+      }
+
+      return output;
+    },
+
+    /**
+     * Decodes a base64 string.
+     * @param {String} input The string to decode.
+     */
+    decode: function (input) {
+      if (typeof(window.atob) === 'function') {
+        try {
+          return utf8_decode(atob(input));
+        }
+        catch (e) {};
+      }
+
+      var chr1, chr2, chr3, enc1, enc2, enc3, enc4, len, i = 0, output = '';
+
+      // remove all characters that are not A-Z, a-z, 0-9, +, /, or =
+      input = input.replace(/[^A-Za-z0-9\+\/\=]/g, "");
+      len = input.length;
+
+      while (i < len) {
+        enc1 = keyStr.indexOf(input.charAt(i++));
+        enc2 = keyStr.indexOf(input.charAt(i++));
+        enc3 = keyStr.indexOf(input.charAt(i++));
+        enc4 = keyStr.indexOf(input.charAt(i++));
+
+        chr1 = (enc1 << 2) | (enc2 >> 4);
+        chr2 = ((enc2 & 15) << 4) | (enc3 >> 2);
+        chr3 = ((enc3 & 3) << 6) | enc4;
+
+        output = output + String.fromCharCode(chr1);
+
+        if (enc3 != 64)
+          output = output + String.fromCharCode(chr2);
+        if (enc4 != 64)
+          output = output + String.fromCharCode(chr3);
+      }
+
+      return utf8_decode(output);
+    }
+  };
+
+  return obj;
+})();