function rollover(img, roll) {
	img.src = "img/" + roll + ".jpg";
}

function apercu(id) {
	xhr_object = createXHR();
	var fichier = "script/ajax.php";
	xhr_object.open("post", fichier, true);
	xhr_object.setRequestHeader('Content-Type','application/x-www-form-urlencoded');
	xhr_object.send("id=" + id);

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

function createXHR() {
	var xhr;
	if(window.XMLHttpRequest) xhr = new XMLHttpRequest();
	else if(window.ActiveXObject) {
		try {
			xhr = new ActiveXObject("Msxml2.XMLHTTP");
      	} catch(e) {
          	xhr = new ActiveXObject("Microsoft.XMLHTTP");
		}
	} else xhr = false;
	return xhr;
}

function mail() {
	chaine_mail = "mailto:contact@nath-graphiste.com?subject=Portfolio";
	location.href = chaine_mail;
}