function pan1(){
			document.getElementById("panneau1").style.visibility="visible";
			document.getElementById("panneau2").style.visibility="hidden";
			document.getElementById("panneau3").style.visibility="hidden";
		}
		
		function pan2(){
			document.getElementById("panneau1").style.visibility="hidden";
			document.getElementById("panneau2").style.visibility="visible";
			document.getElementById("panneau3").style.visibility="hidden";
		}
		
		function pan3(){
			document.getElementById("panneau1").style.visibility="hidden";
			document.getElementById("panneau2").style.visibility="hidden";
			document.getElementById("panneau3").style.visibility="visible";
		}