var Base64 =
{
	KeyString: "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=",

	SafeEncode: function(input, utf8)
	{
		if (utf8)
		{
			input = Base64.Utf8Encode(input);
		}

		var output = "";
		var chr1, chr2, chr3, enc1, enc2, enc3, enc4;
		var i = 0;

		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.KeyString.charAt(enc1) + this.KeyString.charAt(enc2) +
			this.KeyString.charAt(enc3) + this.KeyString.charAt(enc4);
		}

		output = encodeURIComponent(output);
		return output;
	},

	SafeDecode: function(input, utf8)
	{
		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.KeyString.indexOf(input.charAt(i++));
			enc2 = this.KeyString.indexOf(input.charAt(i++));
			enc3 = this.KeyString.indexOf(input.charAt(i++));
			enc4 = this.KeyString.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);
		}
		
		if (utf8)
		{
			output = Base64.Utf8Encode(output);
		}
		return output;
	},
	
	Utf8Encode: function(str)
	{
		var utftext = "";
		for (var n = 0; n < str.length; n++)
		{
			var c = str.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;
	},

	Utf8Decode: function(utftext)
	{
		var str = "";
		var i = 0;
		var c1;
		var c2;
		var c3;

		while (i < utftext.length)
		{
			c1 = utftext.charCodeAt(i);
			if (c1 < 128)
			{
				str += String.fromCharCode(c1);
				i++;
			}
			else if ((c1 > 191) && (c1 < 224))
			{
				c2 = utftext.charCodeAt(i + 1);
				str += String.fromCharCode(((c1 & 31) << 6) | (c2 & 63));
				i += 2;
			}
			else
			{
				c2 = utftext.charCodeAt(i + 1);
				c3 = utftext.charCodeAt(i + 2);
				str += String.fromCharCode(((c1 & 15) << 12) | ((c2 & 63) << 6) | (c3 & 63));
				i += 3;
			}
		}
		return str;
	}
}