function Choix_langues()
{
		if (navigator.language=="fr-FR"){langue="fr"}
		else {if (navigator.language=="de-DE"){langue="de"}
		else {langue="en"}}
		if (langue=="fr"){self.location.href="index_fr.html"}
		else {if (langue=="de"){self.location.href="index_de.html"}
		else {self.location.href="index_en.html"}}
}