loading css3 media queries on ie9 and below

[fris]

css3media queries js library is used for on ie9 or below, anyone know if I load it for all ie, it will interfere with ie10.

normally i would do something like this in wordpress

wp_enqueue_style( 'customcss', get_template_directory_uri() . "/css/ie9.css");
$wp_styles->add_data( 'customcss', 'conditional', 'lt IE 9' );

which adds:

<!--[if lt IE 9]> ... <![endif]-->

but unfortunately its only availble for styles.

so im using the global is_IE, so it loads on all ie's.

global $is_IE;
	if ($is_IE) {
		wp_enqueue_script('css3_mediaqueries', 'http://css3-mediaqueries-js.googlecode.com/svn/trunk/css3-mediaqueries.js');
	}

would like input on the issue loading on all ie's