var enc64List, dec64List;

function initBase64( )
{
    enc64List = new Array( );
    dec64List = new Array( );
    var i;
    for (i = 0; i < 26; i++) {
        enc64List[enc64List.length] = String.fromCharCode(65 + i);
    }
    for (i = 0; i < 26; i++) {
        enc64List[enc64List.length] = String.fromCharCode(97 + i);
    }
    for (i = 0; i < 10; i++) {
        enc64List[enc64List.length] = String.fromCharCode(48 + i);
    }
    enc64List[enc64List.length] = "+";
    enc64List[enc64List.length] = "/";
    for (i = 0; i < 128; i++) {
        dec64List[dec64List.length] = -1;
    }
    for (i = 0; i < 64; i++) {
        dec64List[enc64List[i].charCodeAt(0)] = i;
    }
}

function base64Encode(str)
{
    var c, d, e, end = 0;
    var u, v, w, x;
    var ptr = -1;
    var input = str.split("");
    var output = "";
    while(end==0)
    {
        c = (typeof input[++ptr] != "undefined") ? input[ptr].charCodeAt(0) : ((end = 1) ? 0 : 0);
        d = (typeof input[++ptr] != "undefined") ? input[ptr].charCodeAt(0) : ((end += 1) ? 0 : 0);
        e = (typeof input[++ptr] != "undefined") ? input[ptr].charCodeAt(0) : ((end += 1) ? 0 : 0);
        u = enc64List[c >> 2];
        v = enc64List[(0x00000003 & c) << 4 | d >> 4];
        w = enc64List[(0x0000000F & d) << 2 | e >> 6];
        x = enc64List[e & 0x0000003F];

        if (end >= 1) {x = "=";}
        if (end == 2) {w = "=";}
        if (end < 3) {output += u + v + w + x;}
    }
    var formattedOutput = "";
    var lineLength = 76;
    while (output.length > lineLength)
    {
        formattedOutput += output.substring(0, lineLength) + "\n";
        output = output.substring(lineLength);
    }
    formattedOutput += output;
    return formattedOutput;
}




function base64Decode(str) {
    var c=0, d=0, e=0, f=0, i=0, n=0;
    var input = str.split("");
    var output = "";
    var ptr = 0;
    do {
        f = input[ptr++].charCodeAt(0);
        i = dec64List[f];
        if ( f >= 0 && f < 128 && i != -1 )
        {
            if ( n % 4 == 0 ) {
                c = i << 2;
            } else if ( n % 4 == 1 ) {
                c = c | ( i >> 4 );
                d = ( i & 0x0000000F ) << 4;
            } else if ( n % 4 == 2 ) {
                d = d | ( i >> 2 );
                e = ( i & 0x00000003 ) << 6;
            } else {
                e = e | i;
            }
            n++;
            if ( n % 4 == 0 ) {
                output += String.fromCharCode(c) +
                          String.fromCharCode(d) +
                          String.fromCharCode(e);
            }
        }
    } while (typeof input[ptr] != "undefined");
    output += (n % 4 == 3) ? String.fromCharCode(c) + String.fromCharCode(d) : ((n % 4 == 2) ? String.fromCharCode(c) : "");
    return output;
}


initBase64();


function decode1(str)
{
	//var encodedString = base64Decode(str);
	//document.getElementById('1').value=encodedString.toString();
	return base64Decode(str);
}