No reason why Pauls version using "User" shouldn't work.... or you could use  CurrentUser

var userid = CurrentUser.user_userid;
if (Values("Act")=="201")
{
if (!(userid==27 || userid==28 || userid==32 || userid==38))
{
Hidden=true;
}
}

if you are still struggling, I would ask your business partner for help.

No reason why Pauls version using "User" shouldn't work.... or you could use  CurrentUser

var userid = CurrentUser.user_userid;
if (Values("Act")=="201")
{
if (!(userid==27 || userid==28 || userid==32 || userid==38))
{
Hidden=true;
}
}

if you are still struggling, I would ask your business partner for help.

Thank you Sean - really appreciate your feedback.  I will keep this as another possible answer.  Thank you :)

Hi Sean

I’m dealing with a similar requirement: Make ReadOnly all fields on OpportunityDetailBox for several users if oppo_stage is closed.

I know your solution work for sure:

var userid = CurrentUser.user_userid;
if (Values("Act")=="523"  && Values(Oppo_status ==”Closed”)){
   if (!(userid==27 || userid==28 || userid==32 || userid==38)){
      ReadOnly =true;
   }
}

But have to put this script on the create script of every field and have 20+ fields on screen, so this is hard to maintain after.

Did you know any way to do it with all fields on screen with a single script?

If you want to process several fields in one script then I think you'll have to do it client-side. The server-side field create scripts only expose the properties for the field that the script is 'on'.

Another way to look at it is to put a script in that removes the Change button if the Opportunity is closed for certain users. Would be a shorter scripting than naming all 20+ fields

Good Point!