How to delete or disable an Object?

Cheng Liang Cheng Liang <p144850032@netease.com>
Thu, 3 Sep 1998 12:14:38 +0800 

Hi all,
     A simple question.
     I inserted an Object of lossmodel in a link:
      $ns at 1.5 "$ns lossmodel $loss_module $n(2) $n(3)"
If I would like to delete this object or disable this object at 3.0, how
should I do? Something like this?? :
     $ns at 3.0  "......."
Thank you very much in advance.

Cheng Liang