function montre_det1() { 
    if (navigator.appName=='Microsoft Internet Explorer') 
    { 
           document.all.Layer_det1.style.visibility='visible'; 
           document.all.Layer_det2.style.visibility='hidden';
           document.all.Layer_det3.style.visibility='hidden';
		   
                   
    } 
    else 
    { 
           document.getElementById('Layer_det1').style.visibility='visible';
           document.getElementById('Layer_det2').style.visibility='hidden';
		   document.getElementById('Layer_det3').style.visibility='hidden';
           
     
    } 
                 ;} 

// -----------------------------                 
                 
function montre_det2() {  
    if (navigator.appName=='Microsoft Internet Explorer') 
    { 
           document.all.Layer_det1.style.visibility='hidden'; 
           document.all.Layer_det2.style.visibility='visible';
           document.all.Layer_det3.style.visibility='hidden';
		   
                   
    } 
    else 
    { 
           document.getElementById('Layer_det1').style.visibility='hidden';
           document.getElementById('Layer_det2').style.visibility='visible';
		   document.getElementById('Layer_det3').style.visibility='hidden';
           
     
    } 
                 ;}    
// -----------------------------      
function montre_det3() { 
    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='visible';
		   
                   
    } 
    else 
    { 
           document.getElementById('Layer_det1').style.visibility='hidden';
           document.getElementById('Layer_det2').style.visibility='hidden';
		   document.getElementById('Layer_det3').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';


    } 
                 ;} 

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