check if the user log-in to facebook

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):

Log in or Sign up

Advertising (learn more)

check if the user log-in to facebook

subhinajjar Peon

walime Greenhorn

subhinajjar Peon

Log in or Sign up

Advertising (learn more)

check if the user log-in to facebook

subhinajjar Peon

walime Greenhorn

subhinajjar Peon

Useful Searches