function montre_det(det) { 
    //alert(det);
	document.getElementById(det).style.visibility='visible';
} 

// -----------------------------
function cache_det(det) { // pour faire disparaitre les DIV 
           document.getElementById(det).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';
} 
// -----------------------------