I am trying to create/update a Php Session with Javascript to confirm
if users have Javascript enabled.

My first thought was to create a Javascript that writes a script tag
referencing a php page, which sets a $_SESSION variable.

javascript.js:

<script type="text/javascript">
<!--//
document.write( '<s'+'cript type="text/javascript"
src="javascript .php"></s'+'cript>');...