How can I get it to pass the body content to Facebook ?

I am using the facebookshare module, Below is the code that I have that prints the Facebook share button on my custom node page, prob is it only sends the node title not the node content to facebook. How can I get it to pass that var?

<a name="fb_share" type="button" share_url="<?php
$options = array('absolute' => TRUE);
$targetPath = url('node/'.drupal_get_normal_path(arg(1)), $options); print $targetPath; ?>" href="http://www.facebook.com/sharer.php?u=<?php print $targetPath; ?>">Share</a>
<script src="http://static.ak.fbcdn.net/connect.php/js/FB.Share" type="text/javascript"></script>