function getCookie(name){
var start=document.cookie.indexOf(name+"=");
var len=start+name.length+1;
if (start == -1) return null;
var end=document.cookie.indexOf(";",len);
if (end==-1) end=document.cookie.length;
return unescape(document.cookie.substring(len,end));
}
function bxkuser(){
var user=(getCookie("nznuser") == null) ? "X" : getCookie("nznuser");
if (user.length > 1 ){ w="Olá "+user+" (sair)";
}else{w="Entrar"; }
document.write(w);
}