function switch_language(language) {
	new_link=document.location.href.substring(0,window.location.href.length-6)
	new_link=new_link + language + ".htm"
	document.location.href=new_link
}

function ComputeQuery()
{
  //Recupere les querystring complementaires de la page actuelle	
	var Query = window.location.search.substring(1)

	//Recupere la valeur de "lang"
	posrub = Query.search('lang')
	if (posrub != -1)
	{
	  posEt = Query.substring(posrub).search('[=]')
	  if (posEt != -1)
	    Query = Query.substring(0,posrub) + Query.substring(posEt + posrub + 1)
	  else
	    Query = Query.substring(0,posrub)
	} else {
	    Query="fr"
	}
	
  //Retourne le numéro de la page demandée
	return Query;
}

function ComputeUrl() 
{
  //Retourne la valeur de l'URL demandée
	var url = "rub1_" + ComputeQuery() + ".htm"
	return url;
}