function ajax(){
	var ao = null;
	if(window.XMLHttpRequest)
	   ao = new XMLHttpRequest();
	else if(window.ActiveXObject){
	   try {
                ao = new ActiveXObject("Microsoft.XMLHTTP");
            } catch (e) {
                ao = new ActiveXObject("Msxml2.XMLHTTP");
            }
	}else {
	   alert("Votre navigateur ne supporte pas les objets XMLHTTPRequest...");
	   ao = false;
	}return ao;
}
function load_page(select) {
	var fload = ajax();
	fload.open("GET", select, true);
	fload.send(null);	
	fload.onreadystatechange = function(){
		if ( fload.readyState == 4 ){
			if(fload.status  != 200){
				document.getElementById("article").innerHTML ="Error code " + fload.status;
			}else {
				document.getElementById("article").innerHTML = fload.responseText;
			}
		}else {
			document.getElementById("article").innerHTML = "<p align='center'><h2>Chargement du contenu...</h2></p>";
		}
	}
	fload.open("GET", select.split('?')[1], true);//Appel du fichier externe
	fload.send(null);
}