Attach multiple Files using nlapiSendEmail

Users must use nlapiLoadFile with the internal ID of the files in the File Cabinet and place it in an Array. 

Below is the example:
var attachments = [nlapiLoadFile(1),nlapiLoadFile(16),nlapiLoadFile(228)];
nlapiSendEmail(4, 'test@email.com', 'My Subject', 'Message', null, null, null, attachments);