Facebook Share对话框只刷新页面

Question

我使用以下代码实现了Facebook共享对话框。很偶然，它弹出一个共享对话框。 97％的时间，它只刷新页面。

感谢任何帮助。

<a href="someurl.com/some-article" data-image="myimage.jpg" data-title="My Article Title" data-desc="My description" class="btnShare">Share</a>


<script type="text/javascript">
    window.fbAsyncInit = function(){
        FB.init({
            appId: 'myappID', status: true, cookie: true, xfbml: true });
    };
    (function(d, debug){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" + (debug ? "/debug" : "") + ".js";
        ref.parentNode.insertBefore(js, ref);}(document, /*debug*/ false));
    function postToFeed(title, desc, url, image){
        var obj = {method: 'feed',link: url, picture: 'http://www.url.com/images/'+image,name: title,description: desc};
        function callback(response){}
        FB.ui(obj, callback);
    }


    $('.btnShare').click(function(){
        elem = $(this);
        postToFeed(elem.data('title'), elem.data('desc'), elem.prop('href'), elem.data('image'));

        return false;
    });
</script>