getDisplayValue returning value from wrong field

[___miked___]

I have multiple fields on a form.   I'm trying to get the value of a choice-list field called 'patient_category'.   But, the following code always returns the value of another field on the form -- the patient_name field.   regardless of what field I specify as the getDisplayValue parameter, the system always returns the value of the patient_name field. I'm totally new to scripting in ServiceNow so am wondering what I am missing.    

function onChange(control, oldValue, newValue, isLoading) {

      if (isLoading || newValue == '') {

          return;

    }  

alert(g_form.getDisplayValue('patient_category'));

    }

Thanks in advance for your help.

[Rahul RJ · Accepted solution]

Hi Mike,

Can you try this code

function onChange(control, oldValue, newValue, isLoading) {

      if (isLoading || newValue == '') {

          return;

    }

        alert(g_form.getDisplayBox('patient_category').value);

    }

P.S: Hit Like or Correct depending on the impact of response

[___miked___]

This worked.   Thank you for the solution.   I'm now able to return the selection the user makes.   Now that I have that, my next step is to figure out how to filter the items in a related list based on that value.   Thank you again.   And thanks too to everyone who suggested solutions.