Icon only:
<!-- icon only -->
<script type='text/javascript'>
function fbs_click() {u='<data:post.url/>';t='<data:post.title/>';window.open('http://www.facebook.com/sharer.php?u='+encodeURIComponent(u)+'&t='+encodeURIComponent(t),'sharer','toolbar=0,status=0,width=626,height=436');return false;}
</script>
<a expr:href='"http://www.facebook.com/share.php?u=" + data:post.url' onclick='return fbs_click()' target='_blank'>
<img src='http://b.static.ak.fbcdn.net/images/share/facebook_share_icon.gif?8:26981' alt=''/></a>Text only: Share on Facebook
<!--text only -->
<script type='text/javascript'>
function fbs_click() {u='<data:post.url/>';t='<data:post.title/>';window.open('http://www.facebook.com/sharer.php?u='+encodeURIComponent(u)+'&t='+encodeURIComponent(t),'sharer','toolbar=0,status=0,width=626,height=436');return false;}
</script>
<a expr:href='"http://www.facebook.com/share.php?u=" + data:post.url' onclick='return fbs_click()' target='_blank'>Share on Facebook</a>Icon and text: Share on Facebook
<!-- icon and text -->
<script type='text/javascript'>
function fbs_click() {u='<data:post.url/>';t='<data:post.title/>';window.open('http://www.facebook.com/sharer.php?u='+encodeURIComponent(u)+'&t='+encodeURIComponent(t),'sharer','toolbar=0,status=0,width=626,height=436');return false;}
</script>
<style> html .fb_share_link { padding:2px 0 0 20px; height:16px; background:url(http://b.static.ak.fbcdn.net/images/share/facebook_share_icon.gif?8:26981) no-repeat top left; }</style>
<a expr:href='"http://www.facebook.com/share.php?u=" + data:post.url' class='fb_share_link' onclick='return fbs_click()' target='_blank'>Share on Facebook</a>Share Button: Share
<!-- share button -->
<script type='text/javascript'>
function fbs_click() {u='<data:post.url/>';t='<data:post.title/>';window.open('http://www.facebook.com/sharer.php?u='+encodeURIComponent(u)+'&t='+encodeURIComponent(t),'sharer','toolbar=0,status=0,width=626,height=436');return false;}
</script>
<style> html .fb_share_button { display: -moz-inline-block; display:inline-block; padding:1px 20px 0 5px; height:15px; border:1px solid #d8dfea; background:url(http://b.static.ak.fbcdn.net/images/share/facebook_share_icon.gif?8:26981) no-repeat top right; } html .fb_share_button:hover { color:#fff; border-color:#295582; background:#3b5998 url(http://b.static.ak.fbcdn.net/images/share/facebook_share_icon.gif?8:26981) no-repeat top right; text-decoration:none; } </style>
<a expr:href='"http://www.facebook.com/share.php?u=" + data:post.url' class='fb_share_button' style='text-decoration:none;' onclick='return fbs_click()' target='_blank'>Share</a>