var Nav;
if(navigator.appName=="Netscape"){
	Nav="NS";
} else {
	Nav="IE";
}

function resol() {
	var xhr_object = null;

	if(window.XMLHttpRequest) // Firefox
	   xhr_object = new XMLHttpRequest();
	else if(window.ActiveXObject) // Internet Explorer
	   xhr_object = new ActiveXObject("Microsoft.XMLHTTP");
	else {
	   //alert("Votre navigateur ne supporte pas les objets XMLHTTPRequest...");
	   return;
	}

	var method   = "GET";
	var filename = "resol.php";
	filename+="?htr="+screen.height;
	filename+="&lgr="+screen.width;
	var data     = null;

	xhr_object.open(method, filename, true);

	xhr_object.onreadystatechange = function() {
		if(xhr_object.readyState == 4) {
			//alert(xhr_object.responseText);
		}
	}

	xhr_object.setRequestHeader("Content-type", "application/x-www-form-urlencoded");

	xhr_object.send(data);
}

function change_image(n) {
	document.getElementById("divimg").innerHTML="<img src='img/loading_16x16.gif'>"
	var xhr_object = null;

	if(window.XMLHttpRequest) // Firefox
	   xhr_object = new XMLHttpRequest();
	else if(window.ActiveXObject) // Internet Explorer
	   xhr_object = new ActiveXObject("Microsoft.XMLHTTP");
	else {
	   //alert("Votre navigateur ne supporte pas les objets XMLHTTPRequest...");
	   return;
	}

	var method   = "GET";
	var filename = "image.php";
	filename+="?n="+n;
	var data     = null;

	xhr_object.open(method, filename, true);

	xhr_object.onreadystatechange = function() {
		if(xhr_object.readyState == 4) {
			document.getElementById("divimg").innerHTML=xhr_object.responseText;
		}
	}

	xhr_object.setRequestHeader("Content-type", "application/x-www-form-urlencoded");

	xhr_object.send(data);
}