function montrelang1() { 
    if (navigator.appName=='Microsoft Internet Explorer') 
    { 
           document.all.lang1.style.visibility='visible'; 
           document.all.lang2.style.visibility='hidden'; 
           document.all.lang3.style.visibility='hidden'; 
           document.all.lang4.style.visibility='hidden'; 
           document.all.lang5.style.visibility='hidden'; 
           document.all.lang6.style.visibility='hidden'; 
    } 
    else 
    { 
           document.getElementById('lang1').style.visibility='visible';
           document.getElementById('lang2').style.visibility='hidden';
           document.getElementById('lang3').style.visibility='hidden';
           document.getElementById('lang4').style.visibility='hidden';
           document.getElementById('lang5').style.visibility='hidden';
           document.getElementById('lang6').style.visibility='hidden';
    } 
                 ;} 
// -----------------------------                 
    
function montrelang2() { 
    if (navigator.appName=='Microsoft Internet Explorer') 
    { 
           document.all.lang1.style.visibility='hidden'; 
           document.all.lang2.style.visibility='visible'; 
           document.all.lang3.style.visibility='hidden'; 
           document.all.lang4.style.visibility='hidden'; 
           document.all.lang5.style.visibility='hidden'; 
           document.all.lang6.style.visibility='hidden'; 
    } 
    else 
    { 
           document.getElementById('lang1').style.visibility='hidden';
           document.getElementById('lang2').style.visibility='visible';
           document.getElementById('lang3').style.visibility='hidden';
           document.getElementById('lang4').style.visibility='hidden';
           document.getElementById('lang5').style.visibility='hidden';
           document.getElementById('lang6').style.visibility='hidden';
    } 
                 ;} 
// -----------------------------  

    
function montrelang3() { 
    if (navigator.appName=='Microsoft Internet Explorer') 
    { 
           document.all.lang1.style.visibility='hidden'; 
           document.all.lang2.style.visibility='hidden'; 
           document.all.lang3.style.visibility='visible'; 
           document.all.lang4.style.visibility='hidden'; 
           document.all.lang5.style.visibility='hidden'; 
           document.all.lang6.style.visibility='hidden'; 
    } 
    else 
    { 
           document.getElementById('lang1').style.visibility='hidden';
           document.getElementById('lang2').style.visibility='hidden';
           document.getElementById('lang3').style.visibility='visible';
           document.getElementById('lang4').style.visibility='hidden';
           document.getElementById('lang5').style.visibility='hidden';
           document.getElementById('lang6').style.visibility='hidden';
    } 
                 ;} 
// -----------------------------  

    
function montrelang4() { 
    if (navigator.appName=='Microsoft Internet Explorer') 
    { 
           document.all.lang1.style.visibility='hidden'; 
           document.all.lang2.style.visibility='hidden'; 
           document.all.lang3.style.visibility='hidden'; 
           document.all.lang4.style.visibility='visible'; 
           document.all.lang5.style.visibility='hidden'; 
           document.all.lang6.style.visibility='hidden'; 
    } 
    else 
    { 
           document.getElementById('lang1').style.visibility='hidden';
           document.getElementById('lang2').style.visibility='hidden';
           document.getElementById('lang3').style.visibility='hidden';
           document.getElementById('lang4').style.visibility='visible';
           document.getElementById('lang5').style.visibility='hidden';
           document.getElementById('lang6').style.visibility='hidden';
    } 
                 ;} 
// -----------------------------  

    
function montrelang5() { 
    if (navigator.appName=='Microsoft Internet Explorer') 
    { 
           document.all.lang1.style.visibility='hidden'; 
           document.all.lang2.style.visibility='hidden'; 
           document.all.lang3.style.visibility='hidden'; 
           document.all.lang4.style.visibility='hidden'; 
           document.all.lang5.style.visibility='visible'; 
           document.all.lang6.style.visibility='hidden'; 
    } 
    else 
    { 
           document.getElementById('lang1').style.visibility='hidden';
           document.getElementById('lang2').style.visibility='hidden';
           document.getElementById('lang3').style.visibility='hidden';
           document.getElementById('lang4').style.visibility='hidden';
           document.getElementById('lang5').style.visibility='visible';
           document.getElementById('lang6').style.visibility='hidden';
    } 
                 ;} 
// -----------------------------  

    
function montrelang6() { 
    if (navigator.appName=='Microsoft Internet Explorer') 
    { 
           document.all.lang1.style.visibility='hidden'; 
           document.all.lang2.style.visibility='hidden'; 
           document.all.lang3.style.visibility='hidden'; 
           document.all.lang4.style.visibility='hidden'; 
           document.all.lang5.style.visibility='hidden'; 
           document.all.lang6.style.visibility='visible'; 
    } 
    else 
    { 
           document.getElementById('lang1').style.visibility='hidden';
           document.getElementById('lang2').style.visibility='hidden';
           document.getElementById('lang3').style.visibility='hidden';
           document.getElementById('lang4').style.visibility='hidden';
           document.getElementById('lang5').style.visibility='hidden';
           document.getElementById('lang6').style.visibility='visible';
    } 
                 ;} 
// -----------------------------