I have app on facebook and i write all the code that make me post to the wall of user who read the article on my site just like the yahoo criteria . but now i want to know who is logged in to facebook and if he doesn't logged in to facebook he will not able to read the article on my site and i must enforce him to logged in by display login window. can any body help me on this. and this is my code: <html><head> <meta property="fb:app_id" content="#######" /> <meta property="og:title" content="3eesho reading club" /> <meta property="og:type" content="website" /> <meta property="og:url" content="http://3eesho.com/fb/subhitest/test_PAGE" /> <meta property="og:site_name" content="3eesho.com" /> <meta property="og:image" content="http://ogp.me/logo.png" /> </head> <body> <script type="text/javascript"> function getCookie(c_name) { var i,x,y,ARRcookies=document.cookie.split(";"); for (i=0;i<ARRcookies.length;i++) { x=ARRcookies[i].substr(0,ARRcookies[i].indexOf("=")); y=ARRcookies[i].substr(ARRcookies[i].indexOf("=")+1); x=x.replace(/^\s+|\s+$/g,""); if (x==c_name) { return unescape(y); } } } function setCookie(c_name,value,exdays) { var exdate=new Date(); exdate.setDate(exdate.getDate() + exdays); var c_value=escape(value) + ((exdays==null) ? "" : "; expires="+exdate.toUTCString()); document.cookie=c_name + "=" + c_value; } function checkCookie() { var a=document.location.href; var b=a.split("/"); var username=getCookie("username"); if (username==null || username=="") { alert("thank you for visit this Id:"+b[4]); username=b[4]; myFunction(); setCookie("username",username,365); } else { alert("this Id visited:"+b[4]); if(username!=b[4]) { myFunction(); setCookie("username",b[4],365); } } } function myFunction() { var x; var r=confirm("did you want to publish this article to your wall on facebook"); if (r==true) { x=alert("the article published!"); graphStreamPublish(); } else { x=alert("the article doesn't publish!"); } } </script> <script> (function(d, s, id) { var js, fjs = d.getElementsByTagName(s)[0]; if (d.getElementById(id)) return; js = d.createElement(s); js.id = id; js.src = "//connect.facebook.net/en_US/all.js#xfbml=1&appId=452488354765730"; fjs.parentNode.insertBefore(js, fjs); }(document, 'script', 'facebook-jssdk')); //FB App Script var button; var userInfo; window.fbAsyncInit = function() { FB.init({ appId: '#######', status: true, cookie: true, xfbml: true, oauth: true}); showLoader(true); }; (function() { var e = document.createElement('script'); e.async = true; e.src = document.location.protocol + '//connect.facebook.net/en_US/all.js'; document.getElementById('fb-root').appendChild(e); }()); //stream publish method function graphStreamPublish(){ alert("graphStreamPublish"); showLoader(true); FB.api('/me/feed', 'post', { message : "\u0642\u0631\u0627 \u0647\u0630\u0627 \u0627\u0644\u0645\u0642\u0627\u0644 \u0639\u0644\u0649 \u0639\u064A\u0634\u0648.\u0643\u0648\u0645", link : document.location.href+'?utm_campaign=spring&utm_medium=referral&utm_source=exampleblog'+target="_blank", }, function(response) { showLoader(false); if (!response || response.error) { //alert('Error occured'); } else { alert("Posted as "+response.id); } }); } function showLoader(status){ if (status) document.getElementById('loader').style.display = 'block'; else document.getElementById('loader').style.display = 'none'; } </script> <a href="#" onclick="checkCookie()">Testing</a> <div class="fb-login-button" data-show-faces="true" data-width="180" data-max-rows="1" scope="publish_actions"></div> <div id="loader" style="display:none"></div> </body> </html> Code (markup):