+if (stristr ($_SERVER['HTTP_ACCEPT'], 'application/xhtml+xml'))
+{
+?>
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
+ "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
+<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="fr" lang="fr">
+<?php
+}
+else
+{
+?>
+<!DOCTYPE html>
+<html>
+<?php
+}