function ajax(page,data,zone) { //uniquement en POST
	var xhr_object = null;
	document.getElementById('chargement').innerHTML = 'Chargement...';
	document.body.style.cursor = 'wait';
	if(window.XMLHttpRequest) // Firefox
		xhr_object = new XMLHttpRequest();
	else if(window.ActiveXObject) // Internet Explorer
		xhr_object = new ActiveXObject("Microsoft.XMLHTTP");
	else { // XMLHttpRequest non supporté par le navigateur
		alert("Votre navigateur ne supporte pas les objets XMLHTTPRequest...");
		return;
	}
	if (data=="") { data='jael=ok'; }
	xhr_object.open('POST', page, true);
	xhr_object.onreadystatechange = function() {
		if(xhr_object.readyState == 4) {
			document.getElementById('chargement').innerHTML = '';
			document.body.style.cursor = 'auto';
			document.getElementById(zone).innerHTML = xhr_object.responseText;
		}
	}
	xhr_object.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
	xhr_object.setRequestHeader("Content-Length", data.length);
	xhr_object.send(data);
}

function init() {
	document.getElementById('authname').focus();
	adaptie();
}

function adaptie() {
	if (navigator.appName != 'Netscape') {
		document.body.style.height = '90%';
	}	
}