Determining Home Page and Content Pages Twenty Eleven

On my twenty eleven theme I have in my header:

<?php
      if ($firstURIvar != ''){
	include("inc_topcontent.php");
      } else {
	include("inc_home.php");
}
?>

This is the same code I use in all my wordpress sites to have it so the home page uses one include while all other pages will use a different include file. When I use this code it just uses inc_home.php for ALL pages.

The only thing I can think is that this isn’t working because I’m now using twenty-eleven and not twenty-ten.

The website url looks like this: https://www.websitename.com/newsite/
Which is the home page. Content pages look like https://www.websitename.com/newsite/about

Any ideas?