Extending the nlobjRecord object

Hi everyone,

While working on an optimization, I was wondering about extending the nlobjRecord object with additional functions. For instance, suppose we look at the Transaction record, which would look something like this:

 // extend the nlobjRecord definition  nlobjRecord.prototype.isTransactionNew = function(){     if( this.trandate > (new Date() - 30) ) {        return true;     } else {        return false;     }  }    // create an object to play around with  var transaction = nlapiLoadRecord("transaction", 1234);    // use the new function  if(transaction.isTransactionNew()) {     ...do things...  } 

As far as I can tell, this extension works and I'm considering creating some libraries for custom records. Now my questions are: [LIST=1]
[*]Have any of you extended your class/object definitions?