function montre_det(id, nb) { 
   	for(i=0;i<=nb;i++){
			nom = "Layer_det"+i;
           document.getElementById(nom).style.visibility='hidden';
		}     
		nomok = "Layer_det"+id;
		document.getElementById(nomok).style.visibility='visible'; 
                 ;} 


// -----------------------------
function cache_det() { // pour faire disparaitre les DIV 
    if (navigator.appName=='Microsoft Internet Explorer') 
    { 
           document.all.Layer_det1.style.visibility='hidden';
           document.all.Layer_det2.style.visibility='hidden';
           document.all.Layer_det3.style.visibility='hidden';

 
    } 
    else 
    { 
           document.getElementById('Layer_det1').style.visibility='hidden';
           document.getElementById('Layer_det2').style.visibility='hidden';
           document.getElementById('Layer_det3').style.visibility='hidden';


    } 
                 ;} 
// -----------------------------  

function montre_nuancier() { 
	document.getElementById('Layer_nuancier').style.visibility='visible';
} 
// ----------------------------- 
function cache_nuancier() { 
	document.getElementById('Layer_nuancier').style.visibility='hidden';
} 
// -----------------------------  

// -----------------------------  

function montre_pan() { 
	document.getElementById('Layer_pan').style.visibility='visible';
} 
// ----------------------------- 
function cache_pan() { 
	document.getElementById('Layer_pan').style.visibility='hidden';
} 
// -----------------------------