Clear the List/Record Field using SuiteScript

Example:
'custbody_ field' is a custom transaction body field of List/Record type applied to Sales Order

Clearing of 'custbody_field' can be done using two ways:

var recTrans = nalpiLoadRecord ('salesorder', recID);

1. User event script
• recTrans.setFieldValue( 'custrecord_association', null);
• recTrans.setFieldValue( 'custrecord_association', '');
2. Client side script
• nlapiSetFieldValue('custrecord_association', '');