function montre() { 
    if (navigator.appName=='Microsoft Internet Explorer') 
    { 
           document.all.Layer3.style.visibility='hidden'; 
           document.all.Layer4.style.visibility='hidden';
           document.all.Layer5.style.visibility='visible';
           document.all.Layer6.style.visibility='visible'; 
           
    } 
    else 
    { 
           document.getElementById('Layer3').style.visibility='hidden';
           document.getElementById('Layer4').style.visibility='hidden';
           document.getElementById('Layer5').style.visibility='visible';
           document.getElementById('Layer6').style.visibility='visible';
           
    } 
                 ;} 
// -----------------------------              
                 
function cache() { // pour faire disparaitre les DIV 
    if (navigator.appName=='Microsoft Internet Explorer') 
    { 
           document.all.Layer5.style.visibility='hidden'; 
           document.all.Layer6.style.visibility='hidden';
           document.all.Layer3.style.visibility='visible';
           document.all.Layer4.style.visibility='visible'; 
           
    } 
    else 
    { 
           document.getElementById('Layer5').style.visibility='hidden';
           document.getElementById('Layer6').style.visibility='hidden';
           document.getElementById('Layer3').style.visibility='visible';
           document.getElementById('Layer4').style.visibility='visible';
           
    } 
                 ;} 

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


function MontreDivBlanc() {
	
	 document.getElementById('lien').style.visibility='hidden';
	 document.getElementById('lien').style.display='none';
	 document.getElementById('blanc').style.visibility='visible';
	 document.getElementById('blanc').style.display='block';
	 document.getElementById('img_blanche').style.visibility='visible';
	 document.getElementById('img_blanche').style.display='block';
	 document.getElementById('img_blanche_petit').style.visibility='hidden';
	 document.getElementById('img_blanche_petit').style.display='none';
	 
}

function CacheDivBlanc() {
	
	 document.getElementById('lien').style.visibility='visible';
	 document.getElementById('lien').style.display='block';
	 document.getElementById('blanc').style.visibility='hidden';
	 document.getElementById('blanc').style.display='none';
	 document.getElementById('img_blanche').style.visibility='hidden';
	 document.getElementById('img_blanche').style.display='none';
	 	 document.getElementById('img_blanche_petit').style.visibility='visible';
	 document.getElementById('img_blanche_petit').style.display='block';
}