Help set a default value for Department

Hello,

I spoke with Netsuite support about setting a default value for the "department" field on a custom form. They advised that I could run the following script as a User Event Script.

I don't know how to script or set this up.

Outcome:
Set department on a sales order to a default value: department field = icandy Creative

Code Provided by Support:
*** START CODE ***
    var customForm = nlapiGetFieldValue('customform');
    if(customForm == 100)  // You may simply replace '100' with the internal ID of your custom form.
    {
        ....place your code here....
    }
*** END CODE ***

My Code:
// *** START CODE ***
    var customForm = nlapiGetFieldValue('customform');
    if(customForm == 117)  // You may simply replace '100' with the internal ID of your custom form.