function affiche(num,nbr){	
		for (i=1; i<=nbr; i++) {
			var id = "panneau_"+i;
			if(i==num){block="block";}else{block="none";}
			document.getElementById(id).style.display=block;
			var tab = "tab_"+i;
			if(i==num){var css="on";}else{
			if(i==nbr){var css="last";}else{var css="lien";}}
			document.getElementById(tab).className = css;
		}
	}