function loadData () {
    var username = eval('username').value;
    var userpasswd = eval('userpasswd').value;
    var ip = eval('ip').value;

    req=false;
    try {
        req=new ActiveXObject('Msxml2.XMLHTTP');
    } catch (e) {
        try {
            req=new ActiveXObject('Microsoft.XMLHTTP');
        } catch (e) {
            if(window.XMLHttpRequest){
               req=new XMLHttpRequest();
            }
        }
    }
    if (req) {
       req.onreadystatechange = getData;
       req.open("GET", '/login.php?name='+username+'&passwd='+userpasswd+'shareip='+ip, true);
    }
}
function getData() {
    if (req.readyState == 4){
        if (req.status == 200) {
                if (req.responseText!="NULL") location.href = req.responseText;
        } else {
            if (confirm("Соединение с сервером завершено. Уйти?")) {
                close();
            } else {
                loadData();
            }
            alert("Произошла ошибка "+ req.status+":\n" + req.statusText);
        }
    }
}