ns4 = (document.layers) ? true:false 
ie4 = (document.all) ? true:false 
ng5 = (document.getElementById) ? true:false 


function hide() { 
if (ng5) document.getElementById('photo1').style.display = "none" 
else if (ns4) document.photo1.display = "none" 
else if (ie4) photo1.style.display ="none" 

if (ng5) document.getElementById('photo2').style.display = "none" 
else if (ns4) document.photo2.display = "none" 
else if (ie4) photo2.style.display ="none" 

if (ng5) document.getElementById('photo3').style.display = "none" 
else if (ns4) document.photo3.display = "none" 
else if (ie4) photo3.style.display ="none" 

if (ng5) document.getElementById('photo4').style.display = "none" 
else if (ns4) document.photo4.display = "none" 
else if (ie4) photo4.style.display ="none" 

if (ng5) document.getElementById('photo5').style.display = "none" 
else if (ns4) document.photo5.display = "none" 
else if (ie4) photo5.style.display ="none" 

if (ng5) document.getElementById('photo6').style.display = "none" 
else if (ns4) document.photo6.display = "none" 
else if (ie4) photo6.style.display ="none" 
}

function show(e) { 
hide(); 
if (ng5) document.getElementById(e).style.display = ""; 
else if (ns4) document.layers(e).display = ""; 
else if (ie4) document.all(e).style.display = "";
}