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;
	},
	
	serialize: function ( mixed_value ) {
	    // http://kevin.vanzonneveld.net
	    // +   original by: Arpad Ray (mailto:arpad@php.net)
	    // +   improved by: Dino
	    // +   bugfixed by: Andrej Pavlovic
	    // +   bugfixed by: Garagoth
	    // %          note: We feel the main purpose of this function should be to ease the transport of data between php & js
	    // %          note: Aiming for PHP-compatibility, we have to translate objects to arrays
	    // *     example 1: serialize(['Kevin', 'van', 'Zonneveld']);
	    // *     returns 1: 'a:3:{i:0;s:5:"Kevin";i:1;s:3:"van";i:2;s:9:"Zonneveld";}'
	    // *     example 2: serialize({firstName: 'Kevin', midName: 'van', surName: 'Zonneveld'});
	    // *     returns 2: 'a:3:{s:9:"firstName";s:5:"Kevin";s:7:"midName";s:3:"van";s:7:"surName";s:9:"Zonneveld";}'
	 
	    var _getType = function( inp ) {
	        var type = typeof inp, match;
	        var key;
	        if (type == 'object' && !inp) {
	            return 'null';
	        }
	        if (type == "object") {
	            if (!inp.constructor) {
	                return 'object';
	            }
	            var cons = inp.constructor.toString();
	            if (match = cons.match(/(\w+)\(/)) {
	                cons = match[1].toLowerCase();
	            }
	            var types = ["boolean", "number", "string", "array"];
	            for (key in types) {
	                if (cons == types[key]) {
	                    type = types[key];
	                    break;
	                }
	            }
	        }
	        return type;
	    };
	    var type = _getType(mixed_value);
	    var val, ktype = '';
	    
	    switch (type) {
	        case "function": 
	            val = ""; 
	            break;
	        case "undefined":
	            val = "N";
	            break;
	        case "boolean":
	            val = "b:" + (mixed_value ? "1" : "0");
	            break;
	        case "number":
	            val = (Math.round(mixed_value) == mixed_value ? "i" : "d") + ":" + mixed_value;
	            break;
	        case "string":
	            val = "s:" + mixed_value.length + ":\"" + mixed_value + "\"";
	            break;
	        case "array":
	        case "object":
	            val = "a";
	            /*
	            if (type == "object") {
	                var objname = mixed_value.constructor.toString().match(/(\w+)\(\)/);
	                if (objname == undefined) {
	                    return;
	                }
	                objname[1] = serialize(objname[1]);
	                val = "O" + objname[1].substring(1, objname[1].length - 1);
	            }
	            */
	            var count = 0;
	            var vals = "";
	            var okey;
	            var key;
	            for (key in mixed_value) {
	                ktype = _getType(mixed_value[key]);
	                if (ktype == "function") { 
	                    continue; 
	                }
	                
	                okey = (key.match(/^[0-9]+$/) ? parseInt(key, 10) : key);
	                vals += serialize(okey) +
	                        serialize(mixed_value[key]);
	                count++;
	            }
	            val += ":" + count + ":{" + vals + "}";
	            break;
	    }
	    if (type != "object" && type != "array") {
	      val += ";";
	  }
	    return val;
	},
	
	unserialize : function (data) {
	    // Takes a string representation of variable and recreates it  
	    // 
	    // version: 909.322
	    // discuss at: http://phpjs.org/functions/unserialize
	    // +     original by: Arpad Ray (mailto:arpad@php.net)
	    // +     improved by: Pedro Tainha (http://www.pedrotainha.com)
	    // +     bugfixed by: dptr1988
	    // +      revised by: d3x
	    // +     improved by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
	    // +        input by: Brett Zamir (http://brett-zamir.me)
	    // +     improved by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
	    // +     improved by: Chris
	    // +     improved by: James
	    // %            note: We feel the main purpose of this function should be to ease the transport of data between php & js
	    // %            note: Aiming for PHP-compatibility, we have to translate objects to arrays
	    // *       example 1: unserialize('a:3:{i:0;s:5:"Kevin";i:1;s:3:"van";i:2;s:9:"Zonneveld";}');
	    // *       returns 1: ['Kevin', 'van', 'Zonneveld']
	    // *       example 2: unserialize('a:3:{s:9:"firstName";s:5:"Kevin";s:7:"midName";s:3:"van";s:7:"surName";s:9:"Zonneveld";}');
	    // *       returns 2: {firstName: 'Kevin', midName: 'van', surName: 'Zonneveld'}
	    var error = function (type, msg, filename, line){throw new this.window[type](msg, filename, line);};
	    var read_until = function (data, offset, stopchr){
	        var buf = [];
	        var chr = data.slice(offset, offset + 1);
	        var i = 2;
	        while (chr != stopchr) {
	            if ((i+offset) > data.length) {
	                error('Error', 'Invalid');
	            }
	            buf.push(chr);
	            chr = data.slice(offset + (i - 1),offset + i);
	            i += 1;
	        }
	        return [buf.length, buf.join('')];
	    };
	    var read_chrs = function (data, offset, length){
	        var buf;
	
	        buf = [];
	        for (var i = 0;i < length;i++){
	            var chr = data.slice(offset + (i - 1),offset + i);
	            buf.push(chr);
	        }
	        return [buf.length, buf.join('')];
	    };
	    var _unserialize = function (data, offset){
	        var readdata;
	        var readData;
	        var chrs = 0;
	        var ccount;
	        var stringlength;
	        var keyandchrs;
	        var keys;
	
	        if (!offset) {offset = 0;}
	        var dtype = (data.slice(offset, offset + 1)).toLowerCase();
	
	        var dataoffset = offset + 2;
	        var typeconvert = new Function('x', 'return x');
	
	        switch (dtype){
	            case 'i':
	                typeconvert = function (x) {return parseInt(x, 10);};
	                readData = read_until(data, dataoffset, ';');
	                chrs = readData[0];
	                readdata = readData[1];
	                dataoffset += chrs + 1;
	            break;
	            case 'b':
	                typeconvert = function (x) {return parseInt(x, 10) !== 0;};
	                readData = read_until(data, dataoffset, ';');
	                chrs = readData[0];
	                readdata = readData[1];
	                dataoffset += chrs + 1;
	            break;
	            case 'd':
	                typeconvert = function (x) {return parseFloat(x);};
	                readData = read_until(data, dataoffset, ';');
	                chrs = readData[0];
	                readdata = readData[1];
	                dataoffset += chrs + 1;
	            break;
	            case 'n':
	                readdata = null;
	            break;
	            case 's':
	                ccount = read_until(data, dataoffset, ':');
	                chrs = ccount[0];
	                stringlength = ccount[1];
	                dataoffset += chrs + 2;
	
	                readData = read_chrs(data, dataoffset+1, parseInt(stringlength, 10));
	                chrs = readData[0];
	                readdata = readData[1];
	                dataoffset += chrs + 2;
	                if (chrs != parseInt(stringlength, 10) && chrs != readdata.length){
	                    error('SyntaxError', 'String length mismatch');
	                }
	            break;
	            case 'a':
	                readdata = {};
	
	                keyandchrs = read_until(data, dataoffset, ':');
	                chrs = keyandchrs[0];
	                keys = keyandchrs[1];
	                dataoffset += chrs + 2;
	
	                for (var i = 0; i < parseInt(keys, 10); i++){
	                    var kprops = _unserialize(data, dataoffset);
	                    var kchrs = kprops[1];
	                    var key = kprops[2];
	                    dataoffset += kchrs;
	
	                    var vprops = _unserialize(data, dataoffset);
	                    var vchrs = vprops[1];
	                    var value = vprops[2];
	                    dataoffset += vchrs;
	
	                    readdata[key] = value;
	                }
	
	                dataoffset += 1;
	            break;
	            default:
	                error('SyntaxError', 'Unknown / Unhandled data type(s): ' + dtype);
	            break;
	        }
	        return [dtype, dataoffset - offset, typeconvert(readdata)];
	    };
	    return _unserialize((data+''), 0)[2];
	}
}