Comments popup Fancybox

I’m opening the comments in a popup with the comments_popup_link()

Now I want to load the comments in a fancybox. Anyone got an idea how to do this?

I’m thinking to alter the function comments_popup_script() in comment-template.php:

$javascript = "<script type='text/javascript'>\nfunction wpopen (macagna) {\n    window.open(macagna, '_blank', 'width=$width,height=$height,scrollbars=yes');\n}\n</script>\n";

	echo $javascript;

To something like this:

[Code moderated as per the Forum Rules. Please use the pastebin]

but can’t get it working… Any help is appreciated!