var xmlhttp;

function fb_login() {
    var user_box = document.getElementById("user");
    user_box.innerHTML =
        "<span><center>"
        +"<fb:profile-pic uid='loggedinuser' facebook-logo='true'></fb:profile-pic>"
        +"<br />Welcome, <fb:name uid='loggedinuser'useyou='false'></fb:name>. "
        +"You are connected with FaceBook Connect."
        +"</center></span>";
        FB.XFBML.Host.parseDomTree();
}