Share on facebook

gistfile1.js

// call the Facebook API
message = {
     name: $(this).attr("data-name"),
     link: $(this).attr("data-url"),
     caption: $(this).attr("data-caption"),
     description: $(this).attr("data-description"),
     picture: "http://static.punchtab.com/ebay/images/ebay-sharing-image.png",
     message: "What's in my mind?"
}
FB.api("me/feed", message, function (response) {
...
});


// show a Facebook popup
FB.ui({
    method: "feed",
    name: $(this).attr("data-name"),
    link: $(this).attr("data-url"),
    caption: $(this).attr("data-caption"),
    description: $(this).attr("data-description"),
    picture: "http://static.punchtab.com/ebay/images/ebay-sharing-image.png",
    display: "popup"
});

More:
https://developers.facebook.com/docs/reference/rest/stream.publish/