Creating a child record from a button on the parent form and automatically return back to the parent form after the child has been saved.

i did update the fields and I am now receiving the error "Formula syntax error

There are extra characters beyond the end of the formula."

URLRoot() & "db/" & [_DBID_ROOT_CAUSE] & "?a=API_GenAddRecordForm&_fid_17=" & URLEncode ([Record ID#])& "&z=" & Rurl()

  var text URLONE = URLRoot() & "db/" & [_DBID_ROOT_CAUSE] & "?a=API_GenAddRecordForm&_fid_17=" & URLEncode ([Record ID#]);

var text URLTWO = URLRoot() & "db/"  & [_DBID_DAMAGE] & "?a=dr&rid=" & [Related Damage Parts Incidents2 - Related Incident];

$URLONE
& "&NextURL=" & URLEncode($URLTWO)

Am I missing something?

Thanks for your help!