<div id="fb-root"></div>
<script src="https://connect.facebook.net/en_US/all.js"></script>
<script type="text/javascript">
FB.init({
    apiKey: '{APIKEY}',
    status: true, // check login status
    cookie: true, // enable cookies to allow the server to access the session
    xfbml: true  // parse XFBML
});

function shareFacebook()
{
    FB.ui(
        {
            method: 'stream.publish',
            display: 'popup',
            message: 'I just sold my books for $5.40 on Cash4Books.net and got FREE shipping!  I cleared clutter & made extra cash. It\'s really easy! Sell your books at Cash4Books.net!',
            attachment: {
    			name: 'Sell Books online at Cash4Books.net',
    			caption: 'Free Shipping',
    			description: ('Sell your books today for fast cash. We buy textbooks, best sellers, romance novels, cook books, children\'s books, and so much more. Visit Cash4Books.net now & sell your books today! We pay via check or PayPal.'),
    			href: 'http://www.cash4books.net/index.php?ref=162190',
			    media: [
	                {
	                    type: 'image',
	                    href: 'http://www.cash4books.net?ref=162190&utm_source=facebook&utm_medium=facebook%2Bshare&utm_campaign=Facebook%2BWall%2BPost&utm_term=image:Wall%2B Post%2BThumb%2B',
	                    src: 'http://www.cash4books.net/images/turn_books_into_cash.gif'
	                }
	     	    ]
        	},
        	action_links: [
               { text: 'Sell Books Online', href: 'http://www.cash4books.net/index.php?ref=162190&utm_source=facebook&utm_medium=facebook%2Bshare&utm_campaign=Facebook%2BWall%2BPost&utm_term=bottom%2Blinks:%2BSell%2BBooks%2BOnline' }
           	],
           	user_message_prompt: 'Share your thoughts about Cash4books.net'
        },
        function(response) {
            if (response && response.post_id) {
                $('#closeModal').attr('value','done');
            }
        }
    );
}
</script>

Facebook JS API Problem

JavaScript