[原创]Delphi中ScriptControl的高级应用（二）[2]

    c2 = str.charcodeat(i++);

    if(i == len)

    {

        out += base64encodechars.charat(c1 >> 2);

        out += base64encodechars.charat(((c1 & 0x3)<< 4) | ((c2 & 0xf0) >> 4));

        out += base64encodechars.charat((c2 & 0xf) << 2);

        out += "=";

        break;

    }

    c3 = str.charcodeat(i++);

    out += base64encodechars.charat(c1 >> 2);

    out += base64encodechars.charat(((c1 & 0x3)<< 4) | ((c2 & 0xf0) >> 4));

    out += base64encodechars.charat(((c2 & 0xf) << 2) | ((c3 & 0xc0) >>6));

    out += base64encodechars.charat(c3 & 0x3f);

    }

    return out;

}

function base64decode(str) {

    var c1, c2, c3, c4;

    var i, len, out;