If you are highly desperate to show Ad at a fixed top-bar location, here is the code. Simply show the Ad in any specific webpage’s top location and replace it with example.net  and now show your target destination replacing example.com  -  See the change?

Visitors will see a fixed ad, and you will be able to show different pages through this. You can change height from 120 to something different. Now the code …

<title>This is Title</title>
<frameset rows="120,*" frameborder="no" framespacing="0" border="0">
  <frame name="demo_head" id="demo_head" noresize="noresize" scrolling="no" marginwidth="0" marginheight="0" src="https://www.example.net"/>
  <frame name="demo_body" id="demo_body" noresize="noresize" marginwidth="0" marginheight="0" src="https://www.example.com"/>