how to call .cs method from javascript .......?

Question

hi,

my requriment is how to call .cs method in javascript...?

This is my code just call the "function (response) " in .cs file ....?

<script type="text/javascript">

     // Load the SDK Asynchronously

     (function (d) {

         var js, id = 'facebook-jssdk', ref = d.getElementsByTagName('script')[0];

         if (d.getElementById(id)) { return; }

         js = d.createElement('script'); js.id = id; js.async = true;

         js.src = "//connect.facebook.net/en_US/all.js";

         ref.parentNode.insertBefore(js, ref);

     } (document));

     // Init the SDK upon load

     window.fbAsyncInit = function () {

         FB.init({

             appId: '390102924456276', // App ID

             channelUrl: '//' + window.location.hostname + '/channel', // Path to your Channel File

             status: true, // check login status

             cookie: true, // enable cookies to allow the server to access the session

             xfbml: true  // parse XFBML

         });

         // listen for and handle auth.statusChange events

         FB.Event.subscribe('auth.statusChange', function (response) {

             if (response.authResponse) {

                 // user has auth'd your app and is logged into Facebook

                 var uid = "http://graph.facebook.com/" + response.authResponse.userID + "/picture";

                 FB.api('/me', function (me) {

                

                     document.getElementById('auth-displayname').innerHTML = me.name;

                     document.getElementById('Email').innerHTML = me.email;

                     document.getElementById('profileImg').src = uid;

                     

                 })

                 document.getElementById('auth-loggedout').style.display = 'none';

                 document.getElementById('auth-loggedin').style.display = 'block';

             } else {

                 // user has not auth'd your app, or is not logged into Facebook

                 document.getElementById('auth-loggedout').style.display = 'block';

                 document.getElementById('auth-loggedin').style.display = 'none';

             }

         });

         $("#auth-logoutlink").click(function ()

         { FB.logout(function () { window.location.reload(); }); });

     }

</script>