function doLoadUserLogin(frm) {
    document.getElementById('loginmessage').innerHTML = "Секундочку, происходит регистрация пользователя...";

    var req = new JsHttpRequest();
    req.onreadystatechange = function() {
        if (req.readyState == 4) {
            // Write result to page element (_RESULT becomes responseJS). 
            document.getElementById('userblock').innerHTML = req.responseJS.userblock;
            document.getElementById('loginmessage').innerHTML = req.responseJS.loginmessage;
            document.getElementById('mainwindow').innerHTML = req.responseJS.mainwindow;
        }
    }
    // Prepare request object (automatically choose GET or POST).
    req.open(null, '/login_ajax.php', true);
    // Send data to backend.
    req.send( { frm: frm } );
}

function doLoadUserLogout() {
//    document.getElementById('loginmessage').innerHTML = "Секундочку, производится выход пользователя...";

    var req = new JsHttpRequest();
    req.onreadystatechange = function() {
        if (req.readyState == 4) {
            // Write result to page element (_RESULT becomes responseJS). 
            document.getElementById('userblock').innerHTML = req.responseJS.userblock;
            document.getElementById('mainwindow').innerHTML = req.responseJS.mainwindow;
        }
    }
    // Prepare request object (automatically choose GET or POST).
    req.open(null, '/logout_ajax.php', true);
    // Send data to backend.
    req.send( { x: 1 } );
}