function alertContents(http_request,obj) {
	 if (http_request.readyState == 4) {
		 document.getElementById(obj).innerHTML=http_request.responseText;
	 } 
}

function makeRequest(url,obj) {
	 var http_request = false;
	 if (window.XMLHttpRequest) { // Mozilla, Safari,...
	 	http_request = new XMLHttpRequest();
	 		if (http_request.overrideMimeType) 
	 			http_request.overrideMimeType('text/xml');
	 // Voir la note ci-dessous ŕ propos de cette ligne
	} else if (window.ActiveXObject) { // IE
		try {
			http_request = new ActiveXObject("Msxml2.XMLHTTP");
		} catch (e) {
			try {
				http_request = new ActiveXObject("Microsoft.XMLHTTP");
	 		} catch (e) {
		 	}
	 	}
	 }
	 if (!http_request) {
	 	alert('Service momentanément indiponible.');
	 	return false;
	 }
	
	 http_request.onreadystatechange = function() { alertContents(http_request,obj); };
	 http_request.open('GET', url, true);
	 var data = "typeSimuation="+document.getElementById("type").value+"&i="+document.getElementById("i").value+"&m="+document.getElementById("m").value+"&n="+document.getElementById("n").value; 
	 http_request.send(null); 
}