<!-- facebook sharing api implementation -->
    <script>
        window.fbAsyncInit = function() {
            FB.init({
                appId: 'your-app-id',
                xfbml: true,
                version: 'v2.6'
            });
        };
        function shareFacebookLink() {
            FB.ui({
                method: 'share',
                href: 'https://www.vanquis.co.uk',
                picture: '../images/logo.png',
                title: 'Introducing the Vanquis Card',
                description: 'The Vanquis Credit Card has helped me, it could help you too! As a friend of mine you could get £25 credited to your account if you get accepted and use your Vanquis Credit Card. Simply click on the link below to apply.'
            });
        }
        (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/sdk.js";
            fjs.parentNode.insertBefore(js, fjs);
        }(document, 'script', 'facebook-jssdk'));
    </script>
<a class="button facebook" target="_blank" onclick="shareFacebookLink()" href="https://www.facebook.com/sharer/sharer.php?">
                                    <span>Facebook</span>
                                </a>