Facebook like and share button on ajax

XFBML tags are only parsed on Facebook JS-SDK initialization by default.

You should call FB.XFBML.parse() method once you add social plugin to DOM after page is rendered.

You may call it for all document or by specifying element to search XFBML elements within:

FB.XFBML.parse();
// OR
FB.XFBML.parse(DOM_ELEMENT_WHERE_AJAX_CONTENT_IS_PLACED);