SuiteScript Internalid Write on the Record

Hi Everyone,

Scripting newbie here that is :h_a_w:

I would like to write the internalid value of a record after I hit save. Writing the internalid through suitescript would allow the users to see the internalid after the save.

Here is my current code. I am using a BeforeSubmit User Event Script.

function userEventBeforeSubmit(type){
var internalid = nlapiGetFieldValue('internalid');
nlapiSetFieldValue('custbody_internal_id', internalid);
}

When I run it nothing happens... I am able to get a value and write it when it is a static field updated by the user.