Trick to add same line of code to multiple pages

[ALLMEDIALAB]

Hi,
Is it possible to add a same line of code to 150 HTML pages? The problem I have with Find and Replace
is that the line of code I want to be underneath has a changing number in the code on every page.
How can I solve that?
Regards & Thanks,
David

[Clams]

Enable regular expression in your search and replace the number by \d+