Help wrap script in _front_page() tag

[intrepid]

I'd like to add a 728x90 leaderboard script to display only on my Wordpress front page. I just want to know where to add is_front_page() tag to the script below. I read https://wordpress.stackexchange.com/ques...al-problem and https://codex.wordpress.org/Function_Ref...front_page

I currently have the following in functions.php file:

Code:

add_action('__before_main_container' , 'display_leaderboard');function   display_leaderboard() { ?>
<center> <!--728x90-->
<script id="mNCC" language="javascript">
   medianet_width = "728";
   medianet_height = "90";
   medianet_crid = "1111111111";
   medianet_versionId = "111111";
   (function() {
       var isSSL = 'https:' == document.location.protocol;
       var mnSrc = (isSSL ? 'https:' : 'http:') + '//contextual.media.net/nmedianet.js?cid=1111111' + (isSSL ? '&https=1' : '');
       document.write('<scr' + 'ipt type="text/javascript" id="mNSC" src="' + mnSrc + '"></scr' + 'ipt>');
   })();
</script>
</center> <?php }