function Base64()
{
	var key = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";

	this.encode = function(input)
	{
		var output = '';

		if (input)
		{
			var chr1, chr2, chr3;
			var 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 += key.charAt(enc1) + key.charAt(enc2) + key.charAt(enc3) + key.charAt(enc4);
			}
		}
		return output;
	}

	this.decode = function(input)
	{
		var output = '';

		if(input)
		{
			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 = key.indexOf(input.charAt(i++));
				enc2 = key.indexOf(input.charAt(i++));
				enc3 = key.indexOf(input.charAt(i++));
				enc4 = key.indexOf(input.charAt(i++));

				chr1 = (enc1 << 2) | (enc2 >> 4);
				chr2 = ((enc2 & 15) << 4) | (enc3 >> 2);
				chr3 = ((enc3 & 3) << 6) | enc4;

				output += String.fromCharCode(chr1);

				if (enc3 != 64)
				{
					output += String.fromCharCode(chr2);
				}
				if (enc4 != 64)
				{
					output += String.fromCharCode(chr3);
				}
			}
			
		}
		return output;
	}
}