text: 
  /**
  *
  *  Base64 encode / decode
  *  http://www.webtoolkit.info/
  *
  **/
  
  var Base64 = {
  
  	// private property
  	_keyStr : "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=",
  
  	// public method for encoding
  	encode : function (input) {
  		var output = "";
  		var chr1, chr2, chr3, enc1, enc2, enc3, enc4;
  		var i = 0;
  
  		// input = Base64._utf8_encode(input);
  
  		while (i < input.length) {
  
  			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 +
  			this._keyStr.charAt(enc1) + this._keyStr.charAt(enc2) +
  			this._keyStr.charAt(enc3) + this._keyStr.charAt(enc4);
  
  		}
  
  		return output;
  	},
  
  	// public method for decoding
  	decode : function (input) {
  		var output = "";
  		var chr1, chr2, chr3;
  		var enc1, enc2, enc3, enc4;
  		var i = 0;
  
  		input = input.replace(/[^A-Za-z0-9\+\/\=]/g, "");
  
  		while (i < input.length) {
  
  			enc1 = this._keyStr.indexOf(input.charAt(i++));
  			enc2 = this._keyStr.indexOf(input.charAt(i++));
  			enc3 = this._keyStr.indexOf(input.charAt(i++));
  			enc4 = this._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);
  			}
  
  		}
  
  		output = Base64._utf8_decode(output);
  
  		return output;
  
  	},
  
  	// private method for UTF-8 encoding
  	_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
  	_utf8_decode : function (utftext) {
  		var string = "";
  		var i = 0;
  		var c = c1 = c2 = 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;
  	}
  
  }
  