function createXhrObject()
{
	if (window.XMLHttpRequest)
		return new XMLHttpRequest();
	
	if (window.ActiveXObject)
	{
		var names = [
		              "Msxml2.XMLHTTP.6.0",
		              "Msxml2.XMLHTTP.3.0",
		              "Msxml2.XMLHTTP",
		              "Microsoft.XMLHTTP"
		            ];
		for(var i in names)
		{
			try{ return new ActiveXObject(names[i]); }
			catch(e){}
		}
	}
	window.alert("Votre navigateur ne prend pas en charge l'objet XMLHTTPRequest.");
	return null; // non supporté
}

function actualiserPage(lien,div)
{
	var contenu = document.getElementById(div);
	var page="";
	page = lien + ".php";
	requete = createXhrObject();
	requete.open("GET",page);
	requete.onreadystatechange = function()
	{
		if(requete.readyState==4){contenu.innerHTML=requete.responseText;}
	}
	requete.setRequestHeader("Content-Type","text/html; charset=utf-8");
	requete.send(null);
}