function log1()
{
var a=document.getElementById("log1");
a.style.display="block";
var b=document.getElementById("log2");
b.style.display="none";
var c=document.getElementById("nolog");
c.style.display="none";
}
function log2()
{
var a=document.getElementById("log1");
a.style.display="none";
var b=document.getElementById("log2");
b.style.display="block";
var c=document.getElementById("nolog");
c.style.display="none";
}
function log()
{
var a=document.getElementById("log1");
a.style.display="none";
var b=document.getElementById("log2");
b.style.display="none";
var c=document.getElementById("nolog");
c.style.display="block";
}