//base64   utf-8
var zEncode = {
	Base64 : {
		_key : "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=",
		encode : function(input){
		    input = escape(input);
			var output = "";
			var chr1, chr2, chr3 = "";
			var enc1, enc2, enc3, enc4 = "";
			var i = 0;

			do {
			 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._key.charAt(enc1) + 
				this._key.charAt(enc2) + 
				this._key.charAt(enc3) + 
				this._key.charAt(enc4);
			 chr1 = chr2 = chr3 = "";
			 enc1 = enc2 = enc3 = enc4 = "";
			} while (i < input.length);

			return output;
		},
		decode : function(input){
			var output = "";
			var chr1, chr2, chr3 = "";
			var enc1, enc2, enc3, enc4 = "";
			var i = 0;

			// remove all characters that are not A-Z, a-z, 0-9, +, /, or =
			var base64test = /[^A-Za-z0-9\+\/\=]/g;
			if (base64test.exec(input)) {
			alert("There were invalid base64 characters in the input text.\n" +
			   "Valid base64 characters are A-Z, a-z, 0-9, '+', '/', and '='\n" +
			   "Expect errors in decoding.");
			}
			input = input.replace(/[^A-Za-z0-9\+\/\=]/g, "");

			do {
			enc1 = this._key.indexOf(input.charAt(i++));
			enc2 = this._key.indexOf(input.charAt(i++));
			enc3 = this._key.indexOf(input.charAt(i++));
			enc4 = this._key.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);
			}

			chr1 = chr2 = chr3 = "";
			enc1 = enc2 = enc3 = enc4 = "";

			} while (i < input.length);

			return unescape(output);
		}
	},
	UTF8 : {
		_key : "alsdhwefklssdjfh",
		encode : function(str)
		{
			return unescape(escape(str).replace(/%u/g,"\\u"));
		},
		decode : function(str)
		{
			return unescape(str.replace(/\\u/g,this._key+"%u")).replace(new RegExp(this._key+"%u","g"),"\\u").replace(new RegExp(this._key,"g"),"");
		}
	}
};