Question : What is S=Strict, T=Transitional, and F=Frameset

I am confused about the meaning in the final column, with column header DTD:

http://w3schools.com/tags/default.asp

I assume that means Data Type Definition but the page is not to clear about the three possible values: S, T, F

Please enlighten me.

Thanks,
newbieweb

Answer : What is S=Strict, T=Transitional, and F=Frameset

Not sure if you have Facebook Connect on your site.  If not, take a look at this tutorial page on to implement Share button/link.  Then you can just stick a <img> tag between the <a></a> with your custom button image.  For example:
<a name="fb_share" type="icon" share_url="YOUR_URL"><img src="/img/custombutton.png"></a>.  That way your custom button gets displayed with clickable FB link.

If you have Facebook Connect implemented, I'm sure there's a way to customize it too, but I haven't looked into it.