function request05(f) {
	var l1    = f.elements["metier"];
	var l2    = f.elements["specialite"];
	var index = l1.selectedIndex;
	if(index < 1)
		l2.options.length = 0;
	else {
		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 { // XMLHttpRequest non supporté par le navigateur
			alert("Votre navigateur ne supporte pas les objets XMLHTTPRequest...");
			return;
		}
		xhr_object.open("POST", "metier.php", true);
		xhr_object.onreadystatechange = function anonymous() {
			if(xhr_object.readyState == 4)
				eval(xhr_object.responseText);
		}
		xhr_object.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
		var data = "metier="+escape(l1.options[index].value);
		xhr_object.send(data);
	}
}