Facebook Feed dialog link
<a onClick="window.open('https://www.facebook.com/dialog/feed?app_id=APPID&link=' + encodeURIComponent('ARTICLE-URL') + '&picture=' + encodeURIComponent('ARTICLE-IMAGE') + '&description=' + encodeURIComponent('ARTICLE-DESCRIPTION') + '','sharer','toolbar=0,status=0,width=548,height=325');" href="javascript: void(0)">Share on FB</a>