How to Not Include OnLoad

I have a common file which is a navigation menu that has another common file inside the first.
OnLoad of the home page, I need this ignored as it errors out because there is a missing element that is not to be displayed on the home page.
<!--#include file="../includes/somefile.aspx"-->
 
Is there a way to not include the above line OnLoad?
 
Thanks,
 
TRU
...