function base64() {};
base64.chars = new Array('A','B','C','D','E','F','G','H','I','J','K','L','M','N','O','P','Q','R','S','T','U','V','W','X','Y','Z','a','b','c','d','e','f','g','h','i','j','k','l','m','n','o','p','q','r','s','t','u','v','w','x','y','z','0','1','2','3','4','5','6','7','8','9','+','/');
base64.cadena = "";
base64.cuenta = 0;
base64.setCadena = function (str){
    base64.cadena = str;
    base64.cuenta = 0;
};
base64.read = function (){
    if (!base64.cadena) return "END_OF_INPUT";
    if (base64.cuenta >= base64.cadena.length) return "END_OF_INPUT";
    var c = base64.cadena.charCodeAt(base64.cuenta) & 0xff;
    base64.cuenta++;
    return c;
};
base64.prototype.encode = function (str){
    base64.setCadena(str);
    var result = '';
    var inBuffer = new Array(3);
    var lineCount = 0;
    var done = false;
    while (!done && (inBuffer[0] = base64.read()) != "END_OF_INPUT"){
        inBuffer[1] = base64.read();
        inBuffer[2] = base64.read();
        result += (base64.chars[ inBuffer[0] >> 2 ]);
        if (inBuffer[1] != "END_OF_INPUT"){
            result += (base64.chars [(( inBuffer[0] << 4 ) & 0x30) | (inBuffer[1] >> 4) ]);
            if (inBuffer[2] != "END_OF_INPUT"){
                result += (base64.chars [((inBuffer[1] << 2) & 0x3c) | (inBuffer[2] >> 6) ]);
                result += (base64.chars [inBuffer[2] & 0x3F]);
            } else {
                result += (base64.chars [((inBuffer[1] << 2) & 0x3c)]);
                result += ('=');
                done = true;
            }
        } else {
            result += (base64.chars [(( inBuffer[0] << 4 ) & 0x30)]);
            result += ('=');
            result += ('=');
            done = true;
        }
        lineCount += 4;
        if (lineCount >= 76){
            result += ('\n');
            lineCount = 0;
        }
    }
    return result;
};
b64 = new base64;