function encrypt ( s )
    {
        var n;
        var r = "";
        for( var i=0; i < s.length; i++ )
        {
            n = s.charCodeAt( i );
            if( n >= 8364 ) n = 128;
            r += String.fromCharCode(n+1);
        }        return r;
    }


    function decrypt( s )
    {
        var n;
        var r = "";
        for( var i = 0; i < s.length; i++)
        {
            n = s.charCodeAt( i );
            if( n >= 8364 ) n = 128;
            r += String.fromCharCode( n - 1 );
        }
        return r;
    }