function formHandler(){
				var URL = document.navigation.nav.options[document.navigation.nav.selectedIndex].value;
				window.location.href = URL;
				}

			window.onload=montre;
				
			function montre(id) {
				var d = document.getElementById(id);
				for (var i = 1; i<=50; i++) {
					if (document.getElementById(i)) {document.getElementById(i).style.display='none';}
					}
					if (d) {d.style.display='block';}
				}

			function popupExtrait(url,w,h) {
				window.open(url,'popupExtrait','toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=no,resizable=yes,copyhistory=no,width='+w+',height='+h+',screenX=150,screenY=150,top=150,left=150')
				}