function xcShowLoginDiv () {
    if (!document.getElementById) return true;
    var notloge = document.getElementById("NotLoggedInDiv");
    var logboxe = document.getElementById("LoginBox");    
    if (!notloge || !logboxe) return true;
    notloge.style.display = 'none';
    logboxe.style.display = 'block';   
    return false;
}