Using System fields and the nlapiMergeEmail function

Hey Guys,

I'm attempting to send out an email template using the nlapiMergeEmail and the nlapiSendEmail functions.

I've simply merging a field from the contact table and a few fields from the system table (time, date etc... ) but I am not sure how to reference the system table in the nlapiMergeEmail function.

Below is the merge function i am using which works fine (d is the variable used in a for loop)

var body = nlapiMergeEmail(50,'contact',contactsearch[d].getId())

Does anybody know how to merge fields from the system table?

Thanks

Ross