Invite Facebook friends in asp.net

//initializing API
window.fbAsyncInit = function () { FB.init({ appId: apiKeyofYourApp, status: true, cookie: true, xfbml: true }); };
(function () {
    var e = document.createElement('script'); e.async = false;
    e.src = document.location.protocol + '//connect.facebook.net/en_US/all.js';
    var dv = document.createElement('div');
    dv.id = "fb-root";
    document.body.appendChild(dv);
    document.getElementById('fb-root').appendChild(e);

    //Insert div to loader while fetching information from facebook
    var fbLoader = document.createElement('div');
    fbLoader.id = "fbLoader";
    document.body.appendChild(fbLoader);
    var fbFade = document.createElement('div');
    fbFade.id = "fbfade";
    document.body.appendChild(fbFade);

} ());

//function to start Facebook invitation process
function fbinvitelogin() {
    FB.login(function (response) {
        inviteFriends('dvFBContacts');
        //...
    }, { perms: accessParameters });
}

//Internal function- do not call it.
function inviteFriends(contDiv) {
    FB.getLoginStatus(function (response) {
        if (response.session) {
            //To get already member with your site
            $('#dvFBNonLoggedIn').fadeOut('slow');
            $('#dvFBLoggedIn').fadeIn('slow');
            $('#dvWait').fadeOut('slow');
            getAlreadyUsingFBIds(contDiv);

        } else {
            $('#dvFBNonLoggedIn').fadeIn('slow');
            $('#dvFBLoggedIn').fadeOut('slow');
            $('#dvWait').fadeOut('slow');
        }
    });
}