Adding facebook like button to a web page

The Like button lets a user share a content with friends on Facebook. When the user clicks the Like button on a site, a story appears in the user's friends' News Feed with a link back to that website.



There are two Like button implementations: XFBML and Iframe. The XFBML version is more versatile, but requires use of the JavaScript SDK. The XFBML dynamically re-sizes its height according to whether there are profile pictures to display, gives you the ability (through the Javascript library) to listen for like events so that you know in real time when a user clicks the Like button, and it always gives the user the ability to add an optional comment to the like. If users do add a comment, the story published back to Facebook is given more prominence.

Attributes

href - the URL to like. The XFBML version defaults to the current page.
send - specifies whether to include a Send button with the Like button. This only works with the XFBML version.
layout - there are three options.
standard - displays social text to the right of the button and friends' profile photos below. Minimum width: 225 pixels. Default width: 450 pixels. Height: 35 pixels (without photos) or 80 pixels (with photos).
button_count - displays the total number of likes to the right of the button. Minimum width: 90 pixels. Default width: 90 pixels. Height: 20 pixels.
box_count - displays the total number of likes above the button. Minimum width: 55 pixels. Default width: 55 pixels. Height: 65 pixels.
show_faces - specifies whether to display profile photos below the button (standard layout only)
width - the width of the Like button.
action - the verb to display on the button. Options: 'like', 'recommend'
font - the font to display in the button. Options: 'arial', 'lucida grande', 'segoe ui', 'tahoma', 'trebuchet ms', 'verdana'
colorscheme - the color scheme for the like button. Options: 'light', 'dark'
ref - a label for tracking referrals; must be less than 50 characters and can contain alphanumeric characters and some punctuation (currently +/=-.:_). The ref attribute causes two parameters to be added to the referrer URL when a user clicks a link from a stream story about a Like action:
fb_ref - the ref parameter
fb_source - the stream type ('home', 'profile', 'search', 'other') in which the click occurred and the story type ('oneline' or 'multiline'), concatenated with an underscore.


Open Graph Tags

Open Graph tags are meta tags that you add to the head of your website to describe the entity your page represents, whether it is a band, restaurant, blog, or something else.

An Open Graph tag looks like this:

meta property="og:tag name" content="tag value"

If you use Open Graph tags, the following six are required:

og:title - The title of the entity.
og:type - The type of entity. You must select a type from the list of Open Graph types.
og:image - The URL to an image that represents the entity. Images must be at least 50 pixels by 50 pixels. Square images work best, but you are allowed to use images up to three times as wide as they are tall.
og:url - The canonical, permanent URL of the page representing the entity. When you use Open Graph tags, the Like button posts a link to the og:url instead of the URL in the Like button code.
og:site_name - A human-readable name for your site, e.g., "IMDb".
fb:admins or fb:app_id - A comma-separated list of either the Facebook IDs of page administrators or a Facebook Platform application ID. At a minimum, include only your own Facebook ID.


With Regards,
Er.Animesh Nanda
Software Developer,
Manusis Technology Pvt. Ltd.
Bengaluru,Karnataka,INDIA.