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.

[Abdul Khan4]

Please share the screen shot of the on change script and the form.

[Jaspal Singh]

Hi Mike,

Try using something as below

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

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

          return;

    }

var chk1=g_form.getValue('patient_category');

alert('Patient category is ',chk1.getDisplayValue());

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

    }

[___miked___]

Thanks for the reply.   This suggestion generated the following error. onChange script error: TypeError: chk1.getDisplayValue is not a function function () { [native code] }

[Shishir Srivast]

getDisplayValue() is NOT supported in client side scripting. you can use the getReference() function to get the value, please check if this helps,

function onChange(control, oldValue, newValue, isLoading) {
    var pcat = g_form.getReference('patient_category', doAlert);
}
function doAlert(pcat) {
  alert(pcat.name);
}

or else you need to do GlideAjax call to fetch the value.

[sachin_namjoshi]

use this code

var choiceValue = g_form.getValue(<fieldName>);

var choiceLabel = g_form.getOption(<fieldName>, choiceValue).text;

Regards,

Sachin