Converting UID to NTID

I copied John's javascript to convert a UID to a NTID and I am not getting the correct NTID.  Instead of getting NT0000000e I am getting NT00000000.  I hard code the UID in the variable rqryUsers_UID.  Any thoughts on what I am doing wrong?  His flow is pulling the UID from resources.  Thank you.

 I can't seem to insert the sciprt without getting a bunch of formating.  Sorry/

[code]

if(rqryUsers_UID=="")

  {sNTID="";}

else

    {

    var j=rqryUsers_UID;

    var hexchars =  "0123456789abcdef";

    var hv = "";

    for (var i=0; i< 4; i++)

       {

        k = j & 15;

        hv = hexchars.charAt(k) + hv;

        j = j >> 4;

       }

    sNTID = "NT";

    for (var x = hv.length; x < 8; x++)

        { sNTID = sNTID + "0" };

         sNTID = sNTID + hv;

    }

[/code]