How can I set the incident number text color to red when it is a P1 incident?

[jesusnava]

Hello everyone, 

I would like to change the number of the text color to red when it is a P1 incident, I have this script but seems not to be working:

function onChange(control, oldValue, newValue, isLoading, isTemplate) {
if (isLoading || newValue === '') {
return;
}
if (priority == '1') {
NumberField.setStyle({color: "red"});
}
//Type appropriate comment here, and begin script below

}

..........................................

Anyone can help me out?

Thank you!

[Deepak Ingale1]

Could you please proceed with closure the thread by marking response as correct if you dont have follow up question?

[jesusnava]

thank you...done...