var getencodestring = function (srcstring) {
    //var srcstring = 'abc';
    var base32char = "abcdefghijklmnopqrstuvwxyz234567";
    var i = 0;
    var index = 0;
    var digit = 0;
    var currbyte;
    var nextbyte;
    var retrunstring = '';

    for (var i = 0; i < srcstring.length;) {
        //var          index    = 0;   
        currbyte = (srcstring.charcodeat(i) >= 0) ? srcstring.charcodeat(i)
                                : (srcstring.charcodeat(i) + 256);

        if (index > 3) {
            if ((i + 1) < srcstring.length) {
                nextbyte = (srcstring.charcodeat(i + 1) >= 0)
                                            ? srcstring.charcodeat(i + 1)
                                            : (srcstring.charcodeat(i + 1) + 256);
            } else {
                nextbyte = 0;
            }

            digit = currbyte & (0xff >> index);
            index = (index + 5) % 8;
            digit <<= index;
            digit |= (nextbyte >> (8 - index));
            i++;
        } else {
            digit = (currbyte >> (8 - (index + 5))) & 0x1f;
            index = (index + 5) % 8;

            if (index == 0) {
                i++;
            }
        }

        retrunstring = retrunstring + base32char.charat(digit);
    }
    return retrunstring.tolowercase();
}