function ajax_asynchrone(fichier)
{
	if(window.XMLHttpRequest) // FIREFOX
		  xhr_object = new XMLHttpRequest();
	 else if(window.ActiveXObject) // IE
		  xhr_object = new ActiveXObject("Microsoft.XMLHTTP");
	 else
		  return(false);
		xhr_object.open("GET", fichier, true);
	xhr_object.onreadystatechange = function() // attribution de la fonction
	 {
		if (xhr_object.readyState == 4)
		{
		   document.getElementById('cale').innerHTML = xhr_object.responseText;
		}
	 }
	xhr_object.send(null);
}