How to send and receive http request to Funambol Server

Question

I want to send lonin request with user name and password to Funambol Server which has public ULR (not in localhost). I already have ID and password, and also i can login with my ID in Server, but when i want to use JavaScript to send the login request it dose not response me anything, my question is: Is there any special way to send the request and receive the returned data from Server? I tried the code below, but i did not get any result (the status result which I get: http.readyState = 4 and http.status = 0). If someone knows about this, please give suggestion how to send request and retrieve the data from response?

var http = false;
    var user = "myid";
    var pass = "mypassword";
    if (navigator.appName == "Microsoft Internet Explorer") {
        http = new ActiveXObject("Microsoft.XMLHTTP");
    } else {
        http = new XMLHttpRequest();
    }
    function handle() {
        if (http.readyState == 4) {
                    var response = http.responseText;
                    //var response = eval('(' + http.responseText + ')');
                    //+"--"+ http.readyState +"--"+http.status;
            document.getElementById('p').innerHTML = "response: " + response.data;
            //countcontacts();
        }
    }
    function login() {
        http.onreadystatechange = handle;
        http.open("POST", "/123.125.221.15/login?action=login&login="+user
        +"&password="+pass, true);
        http.send(null);
    }
    function countcontacts() {
        http.onreadystatechange = function() {
            if (http.readyState == 4 && http.status == 200) {
                the_object = eval('(' + http.responseText + ')');
                document.getElementById('p').innerHTML = "Found "
                        + the_object.count + " contacts.";
            }
        }
        http.open("POST", "/123.125.221.15/contact?action=count", true);
        http.send(null);
    }

And also why var response = eval('(' + http.responseText + ')'); throws this Exception:

uncaught syntaxerror unexpected token ) at file android_asset www index html

Thanks in advance!!