<?php
function load_onhover_js() {
?>

<script type="text/javascript">
function MouseChange( Img , imageSrc )
//img will be the tag name, and imageSrc will be the URL of the image
{
	document[Img].src = imageSrc;
}
</script>

<?php }
add_action('wp_head', 'load_onhover_js');
function screenshotcomments () {
global $comment;
$commenturl = get_comment_author_url();
$author = get_comment_author();
$urlnohttp = str_replace(array('http://','https://'), '', $commenturl);
if ( empty( $commenturl ) || 'http://' == $url )
$return = $author;
else

?>

<script type="text/javascript"><!--
var Img<?php the_ID(); ?>On = new Image();
Img<?php the_ID(); ?>On.src = "http://thirdpart.com/<?php echo $urlnohttp;?>";
var Img<?php the_ID(); ?>Off = new Image();
Img<?php the_ID(); ?>Off.src = "<?php bloginfo('url');?>/wp-content/plugins/pluginame/control_play.png";
</script>

<a href="<?php echo $commenturl ?>" onMouseOver="MouseChange( 'Img<?php the_ID(); ?>' , Img<?php the_ID(); ?>On.src )" onMouseOut = "MouseChange( 'Img<?php the_ID(); ?>' , Im<?php the_ID(); ?>Off.src )" ><?php echo $author ?>
<img src="<?php bloginfo('url');?>/wp-content/plugins/pluginname/control_play.png" border="0" name="Img<?php the_ID(); ?>" />
</a>

<?php
 }
add_filter('get_comment_author_link', 'screenshotcomments');

?>