function cipherClass() {
	this.secretkey = 'secretkey';
	this._keyStr = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";

	this.encode = function(string) {
		if(string.length <= 0) return false;
		return this.base64_encode(this.base64_encode(this.convert(string.toString())));
	};
	
	this.decode = function(string) {
		if(string.length <= 0) return false;
		return this.convert(this.base64_decode(this.base64_decode(string)));
	};
	
	this.convert = function(string) {
		var key = this.secretkey.replace(String.fromCharCode(32), '');
		if(key.length < 8) return ('key error');
		var kl = key.length < 32 ? key.length : 32;
		var k = new Array();
		var e = null;
		var temp = null;
		for(i = 0; i < kl; i++) k[i] = key.charCodeAt(i)&0x1F;
		for(i = 0, j = 0; i < string.length; i++) {
			e = string.charCodeAt(i);
			temp = e&0xE0 ? String.fromCharCode(e^k[j]) : String.fromCharCode(e);
			string = this.setCharAt(string, i, temp);
			j++;
			j = j == kl ? 0 : j;
		}
		return string;
	};
	
	this.setCharAt = function(str, index, chr) {
		if(index > str.length-1) return str;
		return str.substr(0,index) + chr + str.substr(index+1);
	};
	
	this.base64_encode = function(input) {
		var output = "";
		var chr1, chr2, chr3, enc1, enc2, enc3, enc4;
		var i = 0;
 
		input = this._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;
	};
	
	this.base64_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 = this._utf8_decode(output);
 
		return output;
	};

	this._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;
	};

	this._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;
	};
}