Client Script usecase

[AkashKushwah]

I have a use case for client script in ServiceNow and i also write script for that but it is not running properly. can anyone help me to find what is wrong in this script.

Disable a field for specific roles
Use Case: Disable the "Assignment Group" field for users without the ITIL role.

script ---

function onLoad() {

   //Type appropriate comment here, and begin script below

   if(!g_user.hasRole("itil")){

    g_form.setDisabled('assignment_group',true);

   }

   else{

    g_form.setDisabled('assignment_group',false);

   }

}

[Ankur Bawiskar · Accepted solution]

@AkashKushwah 

script looks fine

Did you add alert and see?

any UI policy is doing the reverse?

If my response helped please mark it correct and close the thread so that it benefits future readers.