Social Networking Sharing buttons

Hi everyone..
i am getting problem in the code of facebook like and sharing buttons..
When we click on fb like or share button i want to display the thumb of the current page but its not happening it. on like/share button randomly image is selected.
this is my code :
//here ID is the querystring
<meta property="og:url" content="gallery.php?id=<?php echo $_GET['id']; ?>"/>
<meta property="og:title" content="<?php echo $album_title; ?>" />
<meta property="og:site_name" content="favsnaps"/>…
Social Networking Sharing buttons

See original post by dipu0076