function photoB()
{
var elB=document.getElementById('photoB');
var elS=document.getElementById('photoS');

elB.style.display="none";
elS.style.display="";
}


function labs(id)
{
var el=document.getElementById(id);
el.style.display="";
}

function refs(id)
{
var el=document.getElementById(id);

if (el.style.display=="") el.style.display="none";
else el.style.display="";
}