Code:
$content = '<li id="thumb"><a href="' . get_permalink() . '" onMouseOver="showThumbnail(' . $thumb . ',event)" onMouseOut="closeThumbnail()" rel="bookmark" title="Permanent Link: ' . the_title('','',FALSE) .'">' . the_title('','',FALSE) . '</a></li>';
having trouble with the onmouseover printing it, needs to be in 'thumb.jpg'
in quotes